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Flight crew of B727 has inboard flaps fail to retract completely but so does not immediately recognize the problem. No warning light activated. Result is flap overspd on climb.
| Attributes | |
| ACN | 388440 |
| Time | |
| Date | 199712 |
| Day | Fri |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | atc facility : pdx |
| State Reference | OR |
| Altitude | msl bound lower : 16000 msl bound upper : 16000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dawn |
| Aircraft 1 | |
| Controlling Facilities | artcc : zse artcc : zny |
| Operator | common carrier : air carrier |
| Make Model Name | B727 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | enroute : on vectors |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : second officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 140 flight time total : 4000 flight time type : 1800 |
| ASRS Report | 388440 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | aircraft equipment problem : less severe non adherence : published procedure |
| Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
| Resolutory Action | other |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
On departure out of pdx we discovered the inboard flaps were down passing 14000 ft. There was no aircraft vibration or warning lights. The flap handle was up, but the inboard gauge read 15 degrees. (Outboard flaps were up with gauge reading up, flaps were overspd.) we reached a speed of 320 KIAS. It was a dawn takeoff, dark cockpit. It was a very insidious overspd -- aircraft felt good and no warning light. Dark cockpit. Flap handle up. Slats had fully retracted and outboard flaps fully retracted. The appropriate abnormal procedures were accomplished and an uneventful landing made at pdx. Maintenance inspected the flaps for overspd. There was no damage. Human factors performance. I should have caught the problem on the after takeoff check. I did the checklist and thought I checked both gauges, obviously not well enough.
Original NASA ASRS Text
Title: FLC OF B727 HAS INBOARD FLAPS FAIL TO RETRACT COMPLETELY BUT SO DOES NOT IMMEDIATELY RECOGNIZE THE PROB. NO WARNING LIGHT ACTIVATED. RESULT IS FLAP OVERSPD ON CLB.
Narrative: ON DEP OUT OF PDX WE DISCOVERED THE INBOARD FLAPS WERE DOWN PASSING 14000 FT. THERE WAS NO ACFT VIBRATION OR WARNING LIGHTS. THE FLAP HANDLE WAS UP, BUT THE INBOARD GAUGE READ 15 DEGS. (OUTBOARD FLAPS WERE UP WITH GAUGE READING UP, FLAPS WERE OVERSPD.) WE REACHED A SPD OF 320 KIAS. IT WAS A DAWN TKOF, DARK COCKPIT. IT WAS A VERY INSIDIOUS OVERSPD -- ACFT FELT GOOD AND NO WARNING LIGHT. DARK COCKPIT. FLAP HANDLE UP. SLATS HAD FULLY RETRACTED AND OUTBOARD FLAPS FULLY RETRACTED. THE APPROPRIATE ABNORMAL PROCS WERE ACCOMPLISHED AND AN UNEVENTFUL LNDG MADE AT PDX. MAINT INSPECTED THE FLAPS FOR OVERSPD. THERE WAS NO DAMAGE. HUMAN FACTORS PERFORMANCE. I SHOULD HAVE CAUGHT THE PROB ON THE AFTER TKOF CHK. I DID THE CHKLIST AND THOUGHT I CHKED BOTH GAUGES, OBVIOUSLY NOT WELL ENOUGH.
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.