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A fokker 100 engine airworthiness directive inspection of the 12TH state compressor disc assembly revealed that some engines had overflown the time limits.
| Attributes | |
| ACN | 556840 |
| Time | |
| Date | 200208 |
| Day | Tue |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Fokker 100 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| ASRS Report | 556840 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance non adherence : company policies non adherence : far non adherence : published procedure |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | performance deficiency : inspection performance deficiency : non compliance with legal requirements |
| Supplementary | |
| Problem Areas | Company Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | AIRWORTHINESS DIRECTIVE |
Narrative:
Airworthiness directive 2001-01-29 requires repetitive inspection of hpc 12TH stage disc assembly between 1800 and 2200 cycles since last inspection or no more than 18 months since last inspection. Repetitive inspection card XXXX (section 5) was set to be scheduled every 2000 cycles. As a result several engines were 'pre-paid' and inspected as many as 200 cycles early. Since that was not in the window, the engines had essentially overflown when the error was discovered.
Original NASA ASRS Text
Title: A FOKKER 100 ENG AIRWORTHINESS DIRECTIVE INSPECTION OF THE 12TH STATE COMPRESSOR DISC ASSEMBLY REVEALED THAT SOME ENGS HAD OVERFLOWN THE TIME LIMITS.
Narrative: AIRWORTHINESS DIRECTIVE 2001-01-29 REQUIRES REPETITIVE INSPECTION OF HPC 12TH STAGE DISC ASSEMBLY BTWN 1800 AND 2200 CYCLES SINCE LAST INSPECTION OR NO MORE THAN 18 MONTHS SINCE LAST INSPECTION. REPETITIVE INSPECTION CARD XXXX (SECTION 5) WAS SET TO BE SCHEDULED EVERY 2000 CYCLES. AS A RESULT SEVERAL ENGS WERE 'PRE-PAID' AND INSPECTED AS MANY AS 200 CYCLES EARLY. SINCE THAT WAS NOT IN THE WINDOW, THE ENGS HAD ESSENTIALLY OVERFLOWN WHEN THE ERROR WAS DISCOVERED.
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.