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Cases › CEN11IA341 › Cockpit voice recorder

BEECH 1900DGreat Lakes Aviation

181 lines · 06:03:46 – 06:33:23 · Denver, CO, 2011-05-17

The NTSB cautions that a transcript is not a precise science and, taken out of context, can mislead. These are the last words of real people — handle with care.
181 of 181 lines
CaptainFirst officerControllersWarningsSounds
The final secondsjump to the end ↓
  • 06:32:57TWRLakes Air one fifty roger. I show three five left a closed runway and we are responding to you now. CEN11IA341
  • 06:33:01RDO-1roger.
  • 06:33:03TWRops eight Denver tower.
  • 06:33:04RDO-1Denver ops one fifty we had an emergency on the runway.
  • 06:33:09CAM[sound of decrease in engine noise]
  • 06:33:09HOT-1get that right brake in.
  • 06:33:11OPSdid somebody call ops.
  • 06:33:16TWR*** continue to stand by.
  • 06:33:18CAM[sound of further decrease in engine noise]
  • 06:33:23PAXdid a good job boys.

Crew communication

181 lines readobservations a human-factors reviewer takes from a transcript — the sterile cockpit, the Board's own notations, rhythm, CRM markers. Not emotions, not scores: the affect is in the audio, and the audio is sealed
80 / 20
floor share · CA / FO %
0%
non-pertinent talk in sterile window
0 · 1 · 1
laughter · delivery · expletives
0 of 5
crew questions unanswered in 8 s
5 of 6
warnings with a crew response in 5 s
CaptainCaptain: 7 in minute 19Captain: 22 in minute 20Captain: 3 in minute 21Captain: 9 in minute 22Captain: 5 in minute 23Captain: 5 in minute 24Captain: 6 in minute 25Captain: 6 in minute 26Captain: 4 in minute 27Captain: 9 in minute 28Captain: 6 in minute 29Captain: 4 in minute 30First officerFirst officer: 1 in minute 19First officer: 18 in minute 20First officer: 4 in minute 21First officer: 4 in minute 22First officer: 2 in minute 23First officer: 4 in minute 24First officer: 4 in minute 25First officer: 3 in minute 26First officer: 3 in minute 27First officer: 5 in minute 28First officer: 2 in minute 29ControllersControllers: 2 in minute 19Controllers: 1 in minute 22Controllers: 2 in minute 23Controllers: 2 in minute 25Controllers: 4 in minute 26Controllers: 3 in minute 27Controllers: 5 in minute 3006:0306:0806:1306:1806:2306:2806:33
Utterances per minute, one row per speaker on one clock. shaded = sterile-cockpit window · red = end of recording.
Sterile cockpit · 14 CFR 121.542

Window: 06:31:35–06:33:24 · basis: recorder pressure altitude below 10,000 ft. Candidate non-pertinent lines below are a first reading for the investigator, not a finding.

No candidate non-pertinent conversation inside the window.

The Board’s own notations

Delivery and physiological notes the transcribers added in brackets, plus # expletives. 9 words are marked unintelligible (*).

  • #06:30:46“#. CEN11IA341”
  • sound of decreasing background noise, similar to power reduction06:32:37“[sound of decreasing background noise, similar to power reduction]”
Silences of 45 s or more
Concerns voiced, and what followed

Hedged or questioning lines from one pilot in the critical window, with the other pilot’s next words.

None found in the window.

Warnings and the response
  • 06:25:04[sound of low pitch tone, similar to altitude alert]
    → 0 s later: 06:25:04“one one thousand descending one zero thousand.”
  • 06:29:03[sound of high pitch tone, similar to gear warning horn]
    → 1 s later: 06:29:04“thank you.”
  • 06:31:51five hundred.
    → no crew words within 5 s
  • 06:32:10[sound of alternating high pitch tone, similar to landing gear warning horn continues for 9.0 seconds]
    → 2 s later: 06:32:12“that's considered because of the horn.”
  • 06:32:23[sound of alternating high pitch tone, similar to landing gear warning horn continues for 2.8 seconds] CEN11IA341
    → 1 s later: 06:32:24“sorry.”
  • 06:32:39[sound of high pitch tone, similar to stall warning, continues until end of recording]
    → 5 s later: 06:32:44“Denver tower Lakes Air one fifty emergency gear collapse on the runway.”
Questions between the pilots left unanswered

Every question between the pilots drew a reply within 8 s.

Standard callouts
Gear downRunway in sightV1 · not in transcriptRotate / Vr · not in transcriptV2 · not in transcriptPositive rate · not in transcriptGear up · not in transcript1,000 ft · not in transcript500 ft · not in transcriptMinimums · not in transcriptGo around · not in transcriptStabilized · not in transcript

“Not in transcript” never means “not said”: a line may be unintelligible, or the recording may not cover that phase.

Language, as counts
Speakerwordsquestionshedgesexclamationsexpletiveschecklistsnon-pertinent lines
Captain729281103
First officer184410002

Read next to the Board’s coded human-factors findings on the case page. The NTSB cautions that a transcript is not a precise science; these are pointers into it, for a trained reader to weigh.

Hover a line to bookmark it or write a note against it — the note keeps the line’s time, speaker and words.

06:03:46STASTARTOF RECORDINGp.7
06:22:02STASTARTOF TRANSCRIPTp.7
06:22:02CARDO-1hello approach Lakes Air one fifty. level one one thousand three two zero to intercept three five left localizer.p.7
06:22:07APRAPRLakes Air one fifty Denver approach expect runway three five left good morning.p.7
06:22:11CARDO-1mornin'.p.7
06:22:13CAHOT-1runway three five left twelve thousand feet long one hundred fifty feet wide all the lights bells and whistles you could ever want on a runway.p.7
06:22:18CAHOT-1it's this inside one right here. if not down first three thousand feet painted touchdown zone we'll do a go around.p.7
06:22:24FOHOT-2localizer slowly coming alive.p.7
06:22:26CAHOT-1ah it'll be left turn mike six mike seven controls same as always.p.7
06:22:30CAHOT-1airport elevation five thousand four hundred thirty one feet. making the pattern at seven thousand. minimum safe altitude around the Denver V- O-R all sectors nine thousand two hundred feet. CEN11IA341p.7
06:22:37CAHOT-1I-L-S backup is one oh eight decimal five. three fifty two inbound.p.8
06:22:37DYMDYMONat six point eight.p.8
06:22:45APRAPRLakes Air one fifty let me know when you pick up the field twelve o'clock and three eight miles.p.8
06:22:48CARDO-1let you know when we have it Lakes Air one fifty.p.8
06:22:53CAHOT-1twenty thirty no ice no gusts.p.8
06:22:57CAHOT-1* questions?p.8
06:23:02FOHOT-2[prior call on the radio was to Lakes Air one fifty two] that was for us.p.8
06:23:03CAHOT-1I thought he said one fifty two.p.8
06:23:05HOTHOT-?[approach clears Lakes Air one fifty two for a visual approach] yep.p.8
06:23:07CAHOT-1that's a different one.p.8
06:23:07FOHOT-2oh.p.8
06:23:10FOHOT-2no questions.p.8
06:23:11CAHOT-1huh? CEN11IA341p.8
06:23:12FOHOT-2did you ask me if I had any questions or anything?p.9
06:23:13CAHOT-1yeh.p.9
06:23:14FOHOT-2no I don't.p.9
06:23:14CAHOT-1okay.p.9
06:23:15CAHOT-1oh wrrrong thhhhhhing.p.9
06:23:17CAHOT-1descent checklist. ice protection.p.9
06:23:19FOHOT-2ice protection standard three ahh alt static ignitors.p.9
06:23:23CAHOT-1pressurization.p.9
06:23:23FOHOT-2is set fer' Denver.p.9
06:23:24CAHOT-1T-CAS.p.9
06:23:25FOHOT-2is twenty and below.p.9
06:23:26CAHOT-1altimeters. CEN11IA341p.9
06:23:27FOHOT-2ah twenty nine seven zero is set and cross checked.p.10
06:23:28CAHOT-1landing-logo-recognition lights.p.10
06:23:30FOHOT-2are on.p.10
06:23:30CAHOT-1autofeather.p.10
06:23:31FOHOT-2armed.p.10
06:23:32CAHOT-1anti-skid.p.10
06:23:32FOHOT-2not installed.p.10
06:23:33CAHOT-1descending through...eleven thousand.p.10
06:23:35FOHOT-2sterile.p.10
06:23:36CAHOT-1descent checklist is complete.p.10
06:23:37CAHOT-1approach checklist. approach briefing.p.10
06:23:38FOHOT-2complete. CEN11IA341p.10
06:23:39CAHOT-1landing data bugs.p.11
06:23:39FOHOT-2set n' checked.p.11
06:23:40CAHOT-1interior lights.p.11
06:23:41FOHOT-2are on...or partial on.p.11
06:23:43FOHOT-2ah complete.p.11
06:23:44CAHOT-1approach checklist.p.11
06:23:44FOHOT-2complete.p.11
06:23:59ACAC[aircraft call sign Brickyard talks to ATC]p.11
06:24:04FOHOT-2what's Brickyard?p.11
06:24:05CAHOT-1ahhh that's Republic.p.11
06:24:08FOHOT-2the what?p.11
06:24:08CAHOT-1Republic. CEN11IA341p.11
06:24:09FOHOT-2Republic.p.12
06:24:10CAHOT-1so it'll either be the E-one seventy...E-one seventies E-one nineties or now the Q-fours are on their certificate too. so it'll be one of those three.p.12
06:24:18FOHOT-2yeh.p.12
06:24:34HOTHOT-?man it is hazy.p.12
06:24:56CAHOT-1I think he just wants to know how far out you can get it. ***.p.12
06:24:58APRAPRLakes Air one fifty descend and maintain one zero thousand.p.12
06:25:00CARDO-1one zero thousand Lakes Air one fifty.p.12
06:25:02CAHOT-1confirm one zero thousand.p.12
06:25:03FOHOT-2one zero thousand confirmed.p.12
06:25:04◦HOT[sound of low pitch tone, similar to altitude alert]p.12
06:25:04CAHOT-1one one thousand descending one zero thousand.p.12
06:25:06FOHOT-2one one thousand descending one zero thousand. CEN11IA341p.12
06:25:27CAHOT-1that's some good haze.p.13
06:25:28FOHOT-2yeh.p.13
06:25:29CAHOT-1I know where the airport is. It's only twenty five miles away.p.13
06:25:33CAHOT-1I can sort of make out the tents I think...p.13
06:25:37CAHOT-1...or some sort of white buildings.p.13
06:25:42FOHOT-2oh yeh I see 'em...barely....good eye.p.13
06:25:44CAHOT-1I don't see runway lights on though.p.13
06:25:55APRAPRLakes Air one fifty airport twelve o'clock two four miles.p.13
06:25:58CARDO-1ah still lookin' Lakes Air one fifty we'll let cha' know.p.13
06:26:09CAHOT-1yeh they...they can turn their lights on so bright if they turn em on you can see them from...way out...but I'm lookin' for a runway...aw there it is it just came in. twenty four miles on the localizer....see it there....I think I see it....see it black.p.13
06:26:30FOHOT-2ahhh. CEN11IA341p.13
06:26:33CAHOT-1thought I had it.p.14
06:26:35CAHOT-1yeh I think I got it there.p.14
06:26:38FOHOT-2if you got it. go for it.p.14
06:26:41CARDO-1Lakes Air one fifty has the airport in sight.p.14
06:26:44APRAPRLakes Air one fifty cleared visual approach runway three five left cross ah CHOLA at or above one zero thousand.p.14
06:26:50CARDO-1cleared visual three five left CHOLA at or above one zero thousand Lakes Air one fifty.p.14
06:26:54CAHOT-1cleared for the visual.p.14
06:26:54FOHOT-2where's CHOLA?p.14
06:26:56CAHOT-1ah not sure just stay above the glideslope here...it's like sixteen point six...let me look.p.14
06:26:58FOHOT-2alright.p.14
06:27:04FOHOT-2oh yeh I see the runway now. CEN11IA341p.14
06:27:11CAHOT-1gotta’ practice this for ah L-A-X right. yeh sixteen point six.p.15
06:27:16FOHOT-2(ka-yah).p.15
06:27:19CAHOT-1* when you hit the glideslope in Denver you're fine.p.15
06:28:07CAHOT-1yeh I could just see the black strip in the middle of the white...I've seen it so many times you know that's probably...p.15
06:28:12FOHOT-2yehp.15
06:28:12CAHOT-1...that's why I picked it up.p.15
06:28:13FOHOT-2if you're lookin' for it.p.15
06:28:17FOHOT-2alright there's the glideslope I'm just gonna follow it down.p.15
06:28:19APRAPRLakes Air one fifty maintain one seven zero knots or greater to DYMON at DYMON contact tower one three three point three. good morning.p.15
06:28:19CAHOT-1that's good.p.15
06:28:26CAHOT-1what was it to DYMON?p.15
06:28:27FOHOT-2oh one seventy or greater. CEN11IA341p.15
06:28:28CARDO-1one seventy or greater to DYMON over to tower thirty three three Lakes Air one fifty. see ya.p.16
06:28:37CARDO-1hello tower Lakes Air one fifty visual three five left.p.16
06:28:40ATCTWRone fifty Denver tower be advised mike six is closed. runway three five left cleared to land. wind two seven zero at one zero.p.16
06:28:46CARDO-1cleared to land three five left we'll plan at mike seven Lakes Air one fifty.p.16
06:28:51CAHOT-1cleared to land.p.16
06:28:52FOHOT-2cleared to land.p.16
06:28:53CAHOT-1mike six is closed it's gonna be your second high speed on the exit.p.16
06:28:56FOHOT-2okay.p.16
06:29:03◦HOT[sound of high pitch tone, similar to gear warning horn]p.16
06:29:04FOHOT-2thank you.p.16
06:29:06◦HOT[sound of alternating tones, similar to engine ignitors continue throughout parts of descent] CEN11IA341p.16
06:29:07CAHOT-1DYMON is six point eight.p.17
06:29:11PAPA[automated briefer landing announcement]p.17
06:29:15ATCTWRLakes Air one...Lakes Air one fifty Denver final monitor radio check.p.17
06:29:19CARDO-1loud and clear Lakes Air one fifty.p.17
06:29:21ATCTWRand loud and clear. I have to do two more checks for our final monitors. are you ah able to help me out there?p.17
06:29:25CARDO-1sure go ahead.p.17
06:29:26ATCTWRroger thanks.p.17
06:29:27ATCTWRLakes Air one fifty switch to my tower frequency one two four point three.p.17
06:29:46CARDO-1Lakes Air one fifty with ya' on twenty four three.p.17
06:29:48ATCTWRone fifty Denver final monitor radio check.p.17
06:29:50CARDO-1loud and clear Lakes Air one fifty.p.17
06:29:52ATCTWRyeh you too thanks. CEN11IA341p.17
06:29:53ATCTWRLakes Air one fifty we are done with those frequencies. so you are cleared to land three five left. we appreciate you accommodating us on that.p.18
06:29:58CARDO-1no problem. cleared to land three five left Lakes Air one fifty.p.18
06:30:07FOHOT-2ohhhh come on.p.18
06:30:14FOHOT-2flaaaaappppppsssss seventeen.p.18
06:30:18CAHOT-1speed checks. seventeen selected.p.18
06:30:33FOHOT-2gear down. landing checks. props full forward.p.18
06:30:35◦HOT[sound of click, similar to gear handle movement]p.18
06:30:36◦CAM[sound of high pitch tone (approx 800Hz), similar to hydraulic motor pump running for 5.8 seconds]p.18
06:30:39◦CAM[sound of increased propeller noise]p.18
06:30:42◦CAM[sound of increased high pitched tone (800Hz increases to steady 970Hz), similar to hydraulic motor pump running, for 9.8 seconds]p.18
06:30:46CAHOT-1#. CEN11IA341p.18
06:30:50CAHOT-1gear.p.19
06:30:52FOHOT-2the three green.p.19
06:30:55◦HOT[sound of click]p.19
06:30:58CAHOT-1that is three green we've got right left nose.p.19
06:31:02CAHOT-1ahhhhhhh.p.19
06:31:04CAHOT-1flaps.p.19
06:31:05FOHOT-2seventeen.p.19
06:31:05CAHOT-1propellers.p.19
06:31:06FOHOT-2full forward.p.19
06:31:07CAHOT-1holding on final checks.p.19
06:31:07FOHOT-2final checks. CEN11IA341p.19
06:31:08CAHOT-1flaps are seventeen. yaw damper off. is complete. three green. cleared to land by the (tower). * down buckled brief. we've got an in transit light but we've got right hand nose and L which means we've got a locked left gear.p.20
06:31:21FOHOT-2we've got wind two six zero at seven.p.20
06:31:23CAHOT-1roger.p.20
06:31:51!GPWSfive hundred.p.20
06:31:58CAHOT-1ref plus (ten).p.20
06:32:04CAHOT-1visual inspection also shows it down and locked.p.20
06:32:07FOHOT-2okay.p.20
06:32:10◦HOT[sound of alternating high pitch tone, similar to landing gear warning horn continues for 9.0 seconds]p.20
06:32:12CAHOT-1that's considered because of the horn.p.20
06:32:19◦HOT[alternating high pitch tone stops]p.20
06:32:23◦HOT[sound of alternating high pitch tone, similar to landing gear warning horn continues for 2.8 seconds] CEN11IA341p.20
06:32:24FOHOT-2sorry.p.21
06:32:24CAHOT-1ref plus five.p.21
06:32:28CAHOT-1V ref.p.21
06:32:37◦CAM[sound of decreasing background noise, similar to power reduction]p.21
06:32:39◦CAM[sound of clunk]p.21
06:32:39◦HOT[sound of high pitch tone, similar to stall warning, continues until end of recording]p.21
06:32:40HOTHOT-?oh #.p.21
06:32:44CARDO-1Denver tower Lakes Air one fifty emergency gear collapse on the runway.p.21
06:32:48ATCTWRsay again.p.21
06:32:50CARDO-1Lakes Air one fifty we have an emergency gear collapse on the runway. roll the trucks.p.21
06:32:57ATCTWRLakes Air one fifty roger. I show three five left a closed runway and we are responding to you now. CEN11IA341p.21
06:33:01CARDO-1roger.p.22
06:33:03ATCTWRops eight Denver tower.p.22
06:33:04CARDO-1Denver ops one fifty we had an emergency on the runway.p.22
06:33:09◦CAM[sound of decrease in engine noise]p.22
06:33:09CAHOT-1get that right brake in.p.22
06:33:11ATCOPSdid somebody call ops.p.22
06:33:16ATCTWR*** continue to stand by.p.22
06:33:18◦CAM[sound of further decrease in engine noise]p.22
06:33:23PAXPAXdid a good job boys.p.22