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A gulfstream V was operated in non compliance with an airworthiness directive for 10 hours in excess of a required takeoff warning system check. Caused by computer entry error.
| Attributes | |
| ACN | 428273 |
| Time | |
| Date | 199902 |
| Day | Wed |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : zzv.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Controlling Facilities | artcc : esgg.artcc |
| Aircraft 2 | |
| Operator | common carrier : air carrier |
| Make Model Name | Gulfstream I (Large Turboprop) |
| Operating Under FAR Part | Part 135 |
| Flight Phase | ground : maintenance ground : parked |
| Flight Plan | None |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician maintenance : lead technician other personnel oversight : supervisor |
| Qualification | technician : airframe technician : powerplant technician : fcc |
| Experience | maintenance lead technician : 4 maintenance supervisor : 3 maintenance technician : 23 |
| ASRS Report | 428273 |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper maintenance non adherence other |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : tooling performance deficiency : non compliance with legal requirements performance deficiency : scheduled maintenance |
| Supplementary | |
| Problem Areas | Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
The maintenance on this aircraft is tracked using gulfstream's computerized maintenance program. The requirement to check the takeoff alarm system is an airworthiness directive (90-02-05). It has a 150 hour recurrent requirement. Our tracking document was computing this as a 150 landing recurrent requirement. When this error was found, the aircraft had exceeded the inspection threshold by 10 hours. This discrepancy was found during airworthiness directive for using a ferry permit. The ferry permit was unrelated to this maintenance activity. This aircraft is new to our operation. A more thorough effort should have been made to debug the computer tracking system by comparing the chapter 5 requirements with the associated tracking codes and frequencys.
Original NASA ASRS Text
Title: A GULFSTREAM V WAS OPERATED IN NON COMPLIANCE WITH AN AIRWORTHINESS DIRECTIVE FOR 10 HRS IN EXCESS OF A REQUIRED TKOF WARNING SYS CHK. CAUSED BY COMPUTER ENTRY ERROR.
Narrative: THE MAINT ON THIS ACFT IS TRACKED USING GULFSTREAM'S COMPUTERIZED MAINT PROGRAM. THE REQUIREMENT TO CHK THE TKOF ALARM SYS IS AN AIRWORTHINESS DIRECTIVE (90-02-05). IT HAS A 150 HR RECURRENT REQUIREMENT. OUR TRACKING DOCUMENT WAS COMPUTING THIS AS A 150 LNDG RECURRENT REQUIREMENT. WHEN THIS ERROR WAS FOUND, THE ACFT HAD EXCEEDED THE INSPECTION THRESHOLD BY 10 HRS. THIS DISCREPANCY WAS FOUND DURING AIRWORTHINESS DIRECTIVE FOR USING A FERRY PERMIT. THE FERRY PERMIT WAS UNRELATED TO THIS MAINT ACTIVITY. THIS ACFT IS NEW TO OUR OP. A MORE THOROUGH EFFORT SHOULD HAVE BEEN MADE TO DEBUG THE COMPUTER TRACKING SYS BY COMPARING THE CHAPTER 5 REQUIREMENTS WITH THE ASSOCIATED TRACKING CODES AND FREQS.
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.