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Shortly after localizer capture the autoplt disconnected and captain required 20 degrees of bank in yoke to maintain level flight caused by a delaminated inboard trailing edge flap segment departing the aircraft on a B727-200.
| Attributes | |
| ACN | 497039 |
| Time | |
| Date | 200012 |
| Day | Tue |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : dfw.airport |
| State Reference | TX |
| Altitude | msl single value : 4000 |
| Environment | |
| Flight Conditions | IMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : d10.tracon |
| Operator | common carrier : air carrier |
| Make Model Name | B727-200 |
| Operating Under FAR Part | Part 121 |
| Navigation In Use | ils localizer & glide slope : 35l |
| Flight Phase | descent : approach |
| Route In Use | arrival : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 120 flight time total : 4000 flight time type : 330 |
| ASRS Report | 497039 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other anomaly other |
| Independent Detector | aircraft equipment other aircraft equipment : a/p disconnected-yoke dispic. other flight crewa other flight crewb |
| Resolutory Action | flight crew : regained aircraft control |
| Consequence | other other |
| Supplementary | |
| Problem Areas | Aircraft |
| Primary Problem | Aircraft |
Narrative:
On approach, the captain noted a flight control abnormality. For safety, we chose to continue the approach and get the aircraft on the ground. Captain flew the approach with approximately 20 degrees of bank on yoke in order to maintain level flight. Aircraft landed without incident and taxied safely to the gate. We were later informed that part of the trailing edge flap had departed the aircraft due to delamination. Callback conversation with reporter revealed the following information: the reporter stated the crew noticed the autoplt was displacing the yokes and could not keep the airplane on the localizer. The reporter said when the autoplt disconnected the captain found it necessary to hold 20 degrees of bank to maintain level flight. The reporter said the landing was normal and on the ground a technician advised the crew a large segment of the inboard trailing flap was delaminated and departed the aircraft. Reporter further stated that the aircraft was a B727-200.
Original NASA ASRS Text
Title: SHORTLY AFTER LOC CAPTURE THE AUTOPLT DISCONNECTED AND CAPT REQUIRED 20 DEGS OF BANK IN YOKE TO MAINTAIN LEVEL FLT CAUSED BY A DELAMINATED INBOARD TRAILING EDGE FLAP SEGMENT DEPARTING THE ACFT ON A B727-200.
Narrative: ON APCH, THE CAPT NOTED A FLT CTL ABNORMALITY. FOR SAFETY, WE CHOSE TO CONTINUE THE APCH AND GET THE ACFT ON THE GND. CAPT FLEW THE APCH WITH APPROX 20 DEGS OF BANK ON YOKE IN ORDER TO MAINTAIN LEVEL FLT. ACFT LANDED WITHOUT INCIDENT AND TAXIED SAFELY TO THE GATE. WE WERE LATER INFORMED THAT PART OF THE TRAILING EDGE FLAP HAD DEPARTED THE ACFT DUE TO DELAMINATION. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CREW NOTICED THE AUTOPLT WAS DISPLACING THE YOKES AND COULD NOT KEEP THE AIRPLANE ON THE LOC. THE RPTR SAID WHEN THE AUTOPLT DISCONNECTED THE CAPT FOUND IT NECESSARY TO HOLD 20 DEGS OF BANK TO MAINTAIN LEVEL FLT. THE RPTR SAID THE LNDG WAS NORMAL AND ON THE GND A TECHNICIAN ADVISED THE CREW A LARGE SEGMENT OF THE INBOARD TRAILING FLAP WAS DELAMINATED AND DEPARTED THE ACFT. RPTR FURTHER STATED THAT THE ACFT WAS A B727-200.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.