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Recorder reports
16Flight Data Recorder 10A - Specialist's Factual Report
Right Engine Propeller Speed (%)
29. Eng2 Torque (%) Right Engine Torque (%)
30. Flap Asymmetry Flap Asymmetry (discrete)
31. Flaps (deg) Flap Position (degrees)
32. Gnd Speed ... According to ATR,
in the event of a flap asymmetry, the recorded flap position should be considered an
average position of the left and right
Aircraft Performance 13E - ATR Flap and Stall Warning Systems
inner flapp while internal tube ends on
asymmetry detector unit.
Flap asymmetry protection activates
(cid:132)
for an asymmetry between 8 and 10°
• Command ... SYSTEM – Asymmetry certification
The flap system is designed to limit the flap asymmetry (8 to
(cid:132)
10°), to prevent an unsafe condition to develop
Aircraft Performance 13 - Airplane Performance Study Addendum 1
degrees, and the captain's control input to counteract the flap
asymmetry was no longer required. See the configuration change reflected in the shift ... considered two
other potential sources for the uncommanded roll: a second flap asymmetry and a wing stall.
Second Flap Asymmetry as Source of Roll
Airplane Performance Study - Attachment 6 - Operational Information Related to the Southwest Airlines B737-300
left and right trailing edge flaps.
' . ..,.: i..- 4 provides trailing edge flaps asymmetry protection.
4. Flaps Limit Placard (FLAPS UMIT)
lists limit 'airspeed for each
Flight Data Recorder 10 - Factual Report of Group Chairman
Trailing Edge Flap Flap TE Asym T.E. FLAP ASYM
Asymmetry
Left FMC Fail (79) FMC Fail - L FMC FAIL - L
Right FMC Fail
Aircraft Performance 13G - FAA Presentation - Transport Category Certification
Safely operate” includes consideration of airplane
(cid:52)
handling qualities
Asymmetric Flap Deployment
Indication must be provided if needed to prevent or
(cid:52)
counteract ... handling qualities are not unsafe with asymmetry
FAA Handling Qualities Requirements for Icing and
Federal Aviation
Asymmetric Flap Deployment 2
Administration
September 23, 2009
[page
AIRCRAFT PERFORMANCE GROUP STUDY - TEXT
N810TA points 5–9 are flaps Up; points 10–11 are flaps 1. A/C
ON means air conditioning on, A/I OFF means anti-ice off.
AIRCRAFT ... retracted, unaccelerated flight, neutral control wheel, and that the engine
inoperative thrust asymmetry is trimmed with rudder.
NTSB and Boeing engineering staff performed independent consistency
Aircraft Performance 13 - Group Chairman's Performance Study
Reynolds number predetermine the
spanwise location of the initial stall.
• The flaps and inboard wing “glove” stall at much higher angle of attack
than ... wing typically (but not always) stalls before the other, causing a lift
asymmetry and aircraft roll.
• Large roll rates and roll angles can develop, depending
AIRCRAFT PERFORMANCE 13-EXHIBIT 13A CRASH SITE FACTUAL REPORT AND ATTACHMENTS 1-10
flaps 5 for the go-around flap setting for a flaps 20
approach or use flaps 20 as the go-around flap setting ... VREF + 80 Set
“Flaps 5” → “Speed Check Flaps 5 Set”
“Flaps 1” → “Speed Check Flaps 1 Set”
“Flaps Up” → “Speed Check Flaps Up Set”
“VNAV
AIRCRAFT PERFORMANCE GROUP STUDY ATTACHMENTS 5 - 9 (A7 FULL RELEASE)
Match # 5: Deceleration with Flaps UP (Figures: 11A, 11B, and 11C)
Setup Notes
Parameter Notes
Flap Detent Flaps UP based on the paraphrased CVR transcript ... Match # 6: Deceleration with Flaps 1 (Figures: 12A, 12B, and 12C)
Setup Notes
Parameter Notes
Flap Detent Flaps 1 was assumed based on the paraphrased
AIRCRAFT PERFORMANCE STUDY
page 7]
deflection, horizontal stabilizer pitch trim, flap handle position and left/right flap trailing edge
position, and VHF L/R/C key status.
The FDR parameters ... trim command status.
Note that “apparent” FDR left and right parameter asymmetries (e.g., engine or flight control
surface parameters) are affected by the limited parameter
Aircraft Performance
landing weight of 112,500 lbs
and flaps 40, the prior aircraft’s V was 124 kts. The accident flight’s weight ... section will discuss the possible
contributions of the crosswind and reverse thrust asymmetry to the heading deviation.
The McDonnell Douglas report used a yawing moment
Aircraft Performance 13 - Performance Study
factor, the aircraft began to rapidly roll to the left.
Due to asymmetries in the aircraft including the shape of the wings, the control surfaces ... Flight 874
estimated landing weight was 29,327 lbs [Reference 4]. Flaps at the time of the upset were zero.
According to Figure
NTSB Aircraft Accident Report AAR-03/02 (final report, ntsb.gov)
tube, pitch
trim compensator (PTC) motor and actuator, throttle quadrant, throttle handles, flap
handle, spoiler handle, and thrust reverser levers, were located beneath a section ... flap handle was found with its lever latched in the third detent aft of its stowed
position, which corresponded to 15º of flap extension
Aircraft Performance Study Addendum 2 - LEWICE Icing Report
degrees lower than it would without the ice protection system on9. With flaps and landing gear down the
stall warning initiates at a vane angle ... roll and potential loss of control. This is especially true of an asymmetry on the outboard
sections of the wing in front of the ailerons
NTSB Aircraft Accident Report AAR-04/04 (final report, ntsb.gov)
retract the landing gear (if extended), recover normal speed, and select the flaps as
required. If one engine was inoperative, the pilot should “use with ... findings.
A310 Airplanes
2/91
Operation
50 to 300
15º slats and 0º
flaps
Missed
approach;
three
successive
stalls; loss of
control with
repetitive
rudder
movements
Cockpit voice
0No matches.
Findings
3DCA22LA1822022-05-11 · MITSUBISHI CL-600-2B19 · SKYWEST AIRLINES INC
A lateral runway excursion during landing for reasons that could not be
ENG06WA0222006-07-17 · Boeing 747-200F · ATLAS AIR INC
flap asymmetry and roll movement. The fuselage was damaged by the wheel
LAX02FA2662002-08-29 · Airbus Industrie A320-231 · AMERICA WEST AIRLINES
The captain's failure to maintain directional control and his inadvertent application