A B737-300 technician reports confusion on overnight service check job cards. Numbered checks differ...

Attributes
ACN	710154
Time
Date	200608
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Light	Night
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B737-300
Operating Under FAR Part	Part 121
Flight Phase	ground : maintenance
Person 1
Affiliation	company : air carrier
Function	maintenance : technician
Qualification	technician : powerplant technician : airframe
ASRS Report	710154
Person 2
Affiliation	company : air carrier
Function	other personnel other
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation non adherence : published procedure non adherence : far
Independent Detector	other other : 3
Resolutory Action	none taken : detected after the fact
Consequence	other other
Factors
Maintenance	contributing factor : work cards performance deficiency : logbook entry performance deficiency : inspection performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance
Supplementary
Problem Areas	Maintenance Human Performance Aircraft Chart Or Publication
Primary Problem	Maintenance Human Performance

Narrative:

I was advised of a situation by my manager regarding some pylon screws on aircraft. I completed a maintenance service check on this aircraft on aug/xa/06. In thinking back to this night I recall performing a visual inspection of the #1 and #2 upper pylon panels. Visually there were no defects. As extra insurance I then applied my screw driver to the heads of the screws on the leading edge of the upper strut to wing fairing. On the #1 side I was able to get a 1/8-1/4 turn on 2 screws. On #2 side I was able to get a 1/8-1/4 turn on 3 screws. I then continued on to the rest of my task. The maintenance service check has instructions (engines -- step #1 item B) to generate a nrc (non routine card) to install or tighten fasteners. I did not believe at the time that I did either with this minimal movement. While the maintenance service check states that; the service check paperwork states (20; item B) to generate a nrc for loose; pulled or missing fasteners; the maintenance service check per mt 312-00-01 has you checking the same panels (11; item B) but does not have the requirement for the nrc. I find the requirement to do these tasks on separate checks with different paperwork requirements confusing.

Original NASA ASRS Text

Title: A B737-300 TECHNICIAN RPTS CONFUSION ON OVERNIGHT SVC CHK JOB CARDS. NUMBERED CHKS DIFFER WITH REQUIREMENTS FOR NON ROUTINE CARD ENTRY CALLING FOR ADDITIONAL CHKS. (EXAMPLE) #2 CHK CALLS FOR PYLON PANEL SECURITY CHKS.

Narrative: I WAS ADVISED OF A SIT BY MY MGR REGARDING SOME PYLON SCREWS ON ACFT. I COMPLETED A MAINT SVC CHK ON THIS ACFT ON AUG/XA/06. IN THINKING BACK TO THIS NIGHT I RECALL PERFORMING A VISUAL INSPECTION OF THE #1 AND #2 UPPER PYLON PANELS. VISUALLY THERE WERE NO DEFECTS. AS EXTRA INSURANCE I THEN APPLIED MY SCREW DRIVER TO THE HEADS OF THE SCREWS ON THE LEADING EDGE OF THE UPPER STRUT TO WING FAIRING. ON THE #1 SIDE I WAS ABLE TO GET A 1/8-1/4 TURN ON 2 SCREWS. ON #2 SIDE I WAS ABLE TO GET A 1/8-1/4 TURN ON 3 SCREWS. I THEN CONTINUED ON TO THE REST OF MY TASK. THE MAINT SVC CHK HAS INSTRUCTIONS (ENGS -- STEP #1 ITEM B) TO GENERATE A NRC (NON ROUTINE CARD) TO INSTALL OR TIGHTEN FASTENERS. I DID NOT BELIEVE AT THE TIME THAT I DID EITHER WITH THIS MINIMAL MOVEMENT. WHILE THE MAINT SVC CHK STATES THAT; THE SVC CHK PAPERWORK STATES (20; ITEM B) TO GENERATE A NRC FOR LOOSE; PULLED OR MISSING FASTENERS; THE MAINT SVC CHK PER MT 312-00-01 HAS YOU CHKING THE SAME PANELS (11; ITEM B) BUT DOES NOT HAVE THE REQUIREMENT FOR THE NRC. I FIND THE REQUIREMENT TO DO THESE TASKS ON SEPARATE CHKS WITH DIFFERENT PAPERWORK REQUIREMENTS CONFUSING.

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.

A B737-300 technician reports confusion on overnight service check job cards. Numbered checks differ with requirements for non routine card entry calling for additional checks. (Example) #2 check calls for pylon panel security checks.