A B737-700 aircraft first officer seat RAIL stop bolt missing. Aircraft released without MEL write-up for missing bolt; only a maintenance information was noted.

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Attributes
ACN	749111
Time
Date	200709
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Aircraft 1
Controlling Facilities	tower : puw.tower
Operator	common carrier : air carrier
Make Model Name	B737-700
Operating Under FAR Part	Part 121
Person 1
Affiliation	other
Function	maintenance : technician
ASRS Report	749111
Person 2
Function	other personnel other
Events
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
Consequence	other
Factors
Maintenance	contributing factor : briefing performance deficiency : installation performance deficiency : non compliance with legal requirements performance deficiency : logbook entry
Supplementary
Problem Areas	Aircraft Company Maintenance Human Performance
Primary Problem	Maintenance Human Performance

Narrative:

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.