An embraer 145 on takeoff at approximately 100 KTS had the first officer's seat slide backwards to t...

Attributes
ACN	595406
Time
Date	200309
Day	Wed
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 145 ER&LR
Operating Under FAR Part	Part 121
Flight Phase	ground : takeoff roll
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Person 2
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Events
Anomaly	aircraft equipment problem : critical other anomaly other
Independent Detector	other flight crewa other flight crewb
Consequence	other other
Supplementary
Problem Areas	Maintenance Human Performance Company Aircraft
Primary Problem	Aircraft

Narrative:

First officer seat slid back during takeoff roll at approximately 100 KTS. Callback conversation with reporter revealed the following information: the reporter stated the airplane was an embraer 145 and has a fleet problem with cockpit seat fore and aft position locking. The reporter said in this incident the seat locking device was checked twice, first when getting in the seat and adjusting the fore and aft position and secondly on taxi out force was exerted on the control column fore and aft and both times the seat was checked locked. The reporter stated she is 5 ft 2 in tall and positions the seat to the maximum forward position and on takeoff roll slightly below 100 knots the seat moved rapidly aft to the rear stops. The reporter said the captain was the pilot flying and the only task the reporter could accomplish was make air traffic replies. The reporter stated the only corrective action on the seat locking problem so far is to require the seat lock check on taxi out. The reporter said this was their first seat lock problem experience and was a startling surprise!

Original NASA ASRS Text

Title: AN EMBRAER 145 ON TKOF AT APPROX 100 KTS HAD THE FIRST OFFICER'S SEAT SLIDE BACKWARDS TO THE AFT STOPS.

Narrative: FO SEAT SLID BACK DURING TKOF ROLL AT APPROX 100 KTS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE AIRPLANE WAS AN EMBRAER 145 AND HAS A FLEET PROB WITH COCKPIT SEAT FORE AND AFT POSITION LOCKING. THE RPTR SAID IN THIS INCIDENT THE SEAT LOCKING DEVICE WAS CHECKED TWICE, FIRST WHEN GETTING IN THE SEAT AND ADJUSTING THE FORE AND AFT POSITION AND SECONDLY ON TAXI OUT FORCE WAS EXERTED ON THE CTL COLUMN FORE AND AFT AND BOTH TIMES THE SEAT WAS CHECKED LOCKED. THE RPTR STATED SHE IS 5 FT 2 IN TALL AND POSITIONS THE SEAT TO THE MAX FORWARD POSITION AND ON TKOF ROLL SLIGHTLY BELOW 100 KNOTS THE SEAT MOVED RAPIDLY AFT TO THE REAR STOPS. THE RPTR SAID THE CAPT WAS THE PLT FLYING AND THE ONLY TASK THE RPTR COULD ACCOMPLISH WAS MAKE AIR TRAFFIC REPLIES. THE RPTR STATED THE ONLY CORRECTIVE ACTION ON THE SEAT LOCKING PROB SO FAR IS TO REQUIRE THE SEAT LOCK CHECK ON TAXI OUT. THE RPTR SAID THIS WAS THEIR FIRST SEAT LOCK PROB EXPERIENCE AND WAS A STARTLING SURPRISE!

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.

An embraer 145 on takeoff at approximately 100 KTS had the first officer's seat slide backwards to the aft stops.