|37000 Feet||Browse and search NASA's
Aviation Safety Reporting System
|Local Time Of Day||0601 To 1200|
|Locale Reference||airport : zzz.airport|
|Altitude||agl single value : 0|
|Controlling Facilities||tower : puw.tower|
|Operator||common carrier : air carrier|
|Make Model Name||B737-700|
|Operating Under FAR Part||Part 121|
|Function||maintenance : technician|
|Function||other personnel other|
|Anomaly||aircraft equipment problem : critical|
maintenance problem : improper documentation
non adherence : far
non adherence : published procedure
|Independent Detector||other other : 1|
|Resolutory Action||none taken : detected after the fact|
|Maintenance||contributing factor : briefing|
performance deficiency : installation
performance deficiency : non compliance with legal requirements
performance deficiency : logbook entry
Maintenance Human Performance
|Primary Problem||Maintenance Human Performance|
I was called to a gate call at air carrier X for a broken stop pin on the first officer seat. On entering the cockpit; I was handed a seat 'RAIL' stop bolt; nut and 2 spacer blocks. I called maintenance control per my training and verified that I should install the assembly and check seat operations and that the other stops were installed. After installing the assembly I noticed another assembly was missing. I verified that the seat operated normally; was mounted on the rails correctly and that the adjustment latches engaged correctly. I then searched the cockpit and couldn't find the missing seat RAIL's top so I called maintenance controller and told him what had happened and that 1 of the 4 stop bolts was missing. We signed off the stop bolt installation and put the missing bolt on a maintenance note. I also checked that all 3 seat RAIL stop bolts were secure so the seat could not leave the ends of the rails.
Original NASA ASRS Text
Title: A B737-700 ACFT FO SEAT RAIL STOP BOLT MISSING. ACFT RELEASED WITHOUT MEL WRITE-UP FOR MISSING BOLT; ONLY A MAINT INFO WAS NOTED.
Narrative: I WAS CALLED TO A GATE CALL AT ACR X FOR A BROKEN STOP PIN ON THE FO SEAT. ON ENTERING THE COCKPIT; I WAS HANDED A SEAT 'RAIL' STOP BOLT; NUT AND 2 SPACER BLOCKS. I CALLED MAINT CTL PER MY TRAINING AND VERIFIED THAT I SHOULD INSTALL THE ASSEMBLY AND CHK SEAT OPS AND THAT THE OTHER STOPS WERE INSTALLED. AFTER INSTALLING THE ASSEMBLY I NOTICED ANOTHER ASSEMBLY WAS MISSING. I VERIFIED THAT THE SEAT OPERATED NORMALLY; WAS MOUNTED ON THE RAILS CORRECTLY AND THAT THE ADJUSTMENT LATCHES ENGAGED CORRECTLY. I THEN SEARCHED THE COCKPIT AND COULDN'T FIND THE MISSING SEAT RAIL'S TOP SO I CALLED MAINT CTLR AND TOLD HIM WHAT HAD HAPPENED AND THAT 1 OF THE 4 STOP BOLTS WAS MISSING. WE SIGNED OFF THE STOP BOLT INSTALLATION AND PUT THE MISSING BOLT ON A MAINT NOTE. I ALSO CHKED THAT ALL 3 SEAT RAIL STOP BOLTS WERE SECURE SO THE SEAT COULD NOT LEAVE THE ENDS OF THE RAILS.
Data retrieved from NASA's ASRS site as of January 2009 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.