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An embraer 135 on taxi brake check and again on approach the captain's seat unlatched. Found locking pin did not fully seat. Seat has long maintenance history.
| Attributes | |
| ACN | 598424 |
| Time | |
| Date | 200311 |
| Day | Sun |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | EMB ERJ 135 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : taxi |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| ASRS Report | 598424 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Events | |
| Anomaly | aircraft equipment problem : critical other anomaly other |
| Independent Detector | other flight crewa other flight crewb |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : engineering procedure performance deficiency : repair |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance FAA Company Aircraft Maintenance Human Performance |
| Primary Problem | Aircraft |
Narrative:
During brake check and approach the captain seat unlatched. I found that the locking pin didn't fully seat unless pressed down by hand. Maintenance was advised. Callback conversation with reporter revealed the following information: the reporter stated that during the taxi brake check the seat unlatched and moved aft and another uncommanded unlatching occurred during approach. The reporter said the first officer was flying and no control problem was experienced. The reporter stated the carrier has put in place a seat lock check that involves putting your head down between your knees and visually checking the seat lock pin for engagement. The reporter said you really can't see the lock pin in this position but can feel the pin and when pushing down on the lock lever. The reporter said this procedure was accomplished twice in this incident with no positive locking of the seat.
Original NASA ASRS Text
Title: AN EMBRAER 135 ON TAXI BRAKE CHK AND AGAIN ON APCH THE CAPT'S SEAT UNLATCHED. FOUND LOCKING PIN DID NOT FULLY SEAT. SEAT HAS LONG MAINT HISTORY.
Narrative: DURING BRAKE CHK AND APCH THE CAPT SEAT UNLATCHED. I FOUND THAT THE LOCKING PIN DIDN'T FULLY SEAT UNLESS PRESSED DOWN BY HAND. MAINT WAS ADVISED. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THAT DURING THE TAXI BRAKE CHK THE SEAT UNLATCHED AND MOVED AFT AND ANOTHER UNCOMMANDED UNLATCHING OCCURRED DURING APCH. THE RPTR SAID THE FO WAS FLYING AND NO CTL PROB WAS EXPERIENCED. THE RPTR STATED THE CARRIER HAS PUT IN PLACE A SEAT LOCK CHK THAT INVOLVES PUTTING YOUR HEAD DOWN BTWN YOUR KNEES AND VISUALLY CHKING THE SEAT LOCK PIN FOR ENGAGEMENT. THE RPTR SAID YOU REALLY CAN'T SEE THE LOCK PIN IN THIS POS BUT CAN FEEL THE PIN AND WHEN PUSHING DOWN ON THE LOCK LEVER. THE RPTR SAID THIS PROC WAS ACCOMPLISHED TWICE IN THIS INCIDENT WITH NO POSITIVE LOCKING OF THE SEAT.
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.