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A B767-300ER crew on level off at FL270 heard a 'thump' with slight wind noise. Aircraft flew normally with all indications normal. Had left lower air-conditioning door depart aircraft.
| Attributes | |
| ACN | 588153 |
| Time | |
| Date | 200307 |
| Day | Thu |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | msl single value : 27000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | artcc : zzz.artcc tower : sln.tower |
| Operator | common carrier : air carrier |
| Make Model Name | B767-300 and 300 ER |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : private pilot : multi engine pilot : instrument pilot : flight engineer pilot : commercial pilot : atp |
| Experience | flight time last 90 days : 60 flight time total : 4000 flight time type : 1500 |
| ASRS Report | 588153 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Experience | flight time last 90 days : 180 flight time total : 8000 flight time type : 6000 |
| ASRS Report | 588485 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : far non adherence : published procedure |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other other |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : inspection |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft Maintenance Human Performance |
| Primary Problem | Aircraft |
Narrative:
ZZZ departure, FL270 heard a 'bang' and the plane shook, slight wind noise. No warning lights, no abnormal fuel/engine indications, and plane flew normally with autoplt off. After landing in YYY I found out we lost an air conditioning panel approximately 4 ft by 8 ft. Caused damage to surrounding skin on airplane and left inboard flap. Callback conversation with reporter revealed the following information: the reporter stated part of the door departed on takeoff climb as the left and right inboard flaps as well as the left and right main landing gear doors incurred damage. The reporter said at FL270 the remainder of the door departed the airplane with a big 'thump' and the only thing not normal was a wind noise. The reporter stated the 4 ft by 8 ft door was found missing and the damage to the flaps and landing gear doors was examined. The reporter said the airplane had to be maintenance ferried to the manufacturer gear down due to the main landing gear door damage. The reporter stated the landing gear doors on this airplane serve as gear up locks. The reporter said the airplane incurred a long out of service time, but is now back in service. The reporter stated that the investigation by maintenance and engineering found the door latches could be false latched with no visual indication of being unlocked. The reporter said this door was opened and closed by maintenance prior to departure.
Original NASA ASRS Text
Title: A B767-300ER CREW ON LEVEL OFF AT FL270 HEARD A 'THUMP' WITH SLIGHT WIND NOISE. ACFT FLEW NORMALLY WITH ALL INDICATIONS NORMAL. HAD LEFT LOWER AIR-CONDITIONING DOOR DEPART ACFT.
Narrative: ZZZ DEP, FL270 HEARD A 'BANG' AND THE PLANE SHOOK, SLIGHT WIND NOISE. NO WARNING LIGHTS, NO ABNORMAL FUEL/ENG INDICATIONS, AND PLANE FLEW NORMALLY WITH AUTOPLT OFF. AFTER LNDG IN YYY I FOUND OUT WE LOST AN AIR CONDITIONING PANEL APPROX 4 FT BY 8 FT. CAUSED DAMAGE TO SURROUNDING SKIN ON AIRPLANE AND LEFT INBOARD FLAP. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED PART OF THE DOOR DEPARTED ON TKOF CLB AS THE L AND R INBOARD FLAPS AS WELL AS THE L AND R MAIN LNDG GEAR DOORS INCURRED DAMAGE. THE RPTR SAID AT FL270 THE REMAINDER OF THE DOOR DEPARTED THE AIRPLANE WITH A BIG 'THUMP' AND THE ONLY THING NOT NORMAL WAS A WIND NOISE. THE RPTR STATED THE 4 FT BY 8 FT DOOR WAS FOUND MISSING AND THE DAMAGE TO THE FLAPS AND LNDG GEAR DOORS WAS EXAMINED. THE RPTR SAID THE AIRPLANE HAD TO BE MAINT FERRIED TO THE MANUFACTURER GEAR DOWN DUE TO THE MAIN LNDG GEAR DOOR DAMAGE. THE RPTR STATED THE LNDG GEAR DOORS ON THIS AIRPLANE SERVE AS GEAR UP LOCKS. THE RPTR SAID THE AIRPLANE INCURRED A LONG OUT OF SVC TIME, BUT IS NOW BACK IN SVC. THE RPTR STATED THAT THE INVESTIGATION BY MAINT AND ENGINEERING FOUND THE DOOR LATCHES COULD BE FALSE LATCHED WITH NO VISUAL INDICATION OF BEING UNLOCKED. THE RPTR SAID THIS DOOR WAS OPENED AND CLOSED BY MAINT PRIOR TO DEP.
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.