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A maintenance controller reports the required x-dimension (x-dim) check on all three landing gears for a B737-300; was not accomplished within 10 to 25 flight cycles.
| Attributes | |
| ACN | 791506 |
| Time | |
| Date | 200806 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-300 |
| Operating Under FAR Part | Part 121 |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| ASRS Report | 791506 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance 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 : scheduled maintenance performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Company |
| Primary Problem | Maintenance Human Performance |
Narrative:
A maintenance note was issued on nxxx to check the x-dim on all 3 gear within 10-25 cycles. The aircraft went back into service with '0' cycles flown. Every morning when I checked the MEL run there was zero cycles on the x-dim. With zero cycles; there was no need to check or schedule the aircraft for an x-dim check that day because it would be scheduled for a maximum of 11 cycles. The night shift usually updates the number of cycles flown that day and gives a number to start counting from the next day. I guess we missed the actual cycles flown.
Original NASA ASRS Text
Title: A MAINT CONTROLLER REPORTS THE REQUIRED X-DIMENSION (X-DIM) CHECK ON ALL THREE LANDING GEARS FOR A B737-300; WAS NOT ACCOMPLISHED WITHIN 10 TO 25 FLIGHT CYCLES.
Narrative: A MAINT NOTE WAS ISSUED ON NXXX TO CHK THE X-DIM ON ALL 3 GEAR WITHIN 10-25 CYCLES. THE ACFT WENT BACK INTO SVC WITH '0' CYCLES FLOWN. EVERY MORNING WHEN I CHKED THE MEL RUN THERE WAS ZERO CYCLES ON THE X-DIM. WITH ZERO CYCLES; THERE WAS NO NEED TO CHK OR SCHEDULE THE ACFT FOR AN X-DIM CHK THAT DAY BECAUSE IT WOULD BE SCHEDULED FOR A MAX OF 11 CYCLES. THE NIGHT SHIFT USUALLY UPDATES THE NUMBER OF CYCLES FLOWN THAT DAY AND GIVES A NUMBER TO START COUNTING FROM THE NEXT DAY. I GUESS WE MISSED THE ACTUAL CYCLES FLOWN.
Data retrieved from NASA's ASRS site as of May 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.