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DC9-30 dispatcher found the aircraft maintenance records did not reflect the actual engines installed on the aircraft.
| Attributes | |
| ACN | 556117 |
| Time | |
| Date | 200207 |
| Day | Wed |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Daylight |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | DC-9 30 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel |
| ASRS Report | 556117 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : less severe maintenance problem : improper documentation maintenance problem : improper maintenance other anomaly other |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : schedule pressure performance deficiency : training performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Company Maintenance Human Performance |
| Primary Problem | Company |
Narrative:
On jul/fri/02, aircraft X came out of 'C' check with both JT8D-9A engines. Prior to the 'C' check, aircraft X was configured with mixed engines and was performance rated with JT8D-7A engines. The engine change from mixed to standard confign was never communicated. On jul/wed/02, during the departure taxi out of ZZZ, the cockpit crew realized the performance information they had was for JT8D-7A engines, when in fact the aircraft had JT8D-9A engines. The crew immediately contacted dispatch and maintenance control, and the flight returned to the gate and the aircraft was taken OTS until all applicable changes in performance specifications and cockpit instrumentation could be made. During the time that aircraft was in service between jun/fri/02 and jul/wed/02, 5 individual flts were completed. I released 2 of the flts. The cause of this performance discrepancy was caused by technical services' failure to complete paperwork and checklists to reflect the change in engine confign. Technical services remains committed to finding an effective solution to ensure that engine changes are recorded and communicated in a timely manner, and dispatch remains committed to assisting technical services in event may possible.
Original NASA ASRS Text
Title: DC9-30 DISPATCHER FOUND THE ACFT MAINT RECORDS DID NOT REFLECT THE ACTUAL ENGS INSTALLED ON THE ACFT.
Narrative: ON JUL/FRI/02, ACFT X CAME OUT OF 'C' CHK WITH BOTH JT8D-9A ENGS. PRIOR TO THE 'C' CHK, ACFT X WAS CONFIGURED WITH MIXED ENGS AND WAS PERFORMANCE RATED WITH JT8D-7A ENGS. THE ENG CHANGE FROM MIXED TO STANDARD CONFIGN WAS NEVER COMMUNICATED. ON JUL/WED/02, DURING THE DEP TAXI OUT OF ZZZ, THE COCKPIT CREW REALIZED THE PERFORMANCE INFO THEY HAD WAS FOR JT8D-7A ENGS, WHEN IN FACT THE ACFT HAD JT8D-9A ENGS. THE CREW IMMEDIATELY CONTACTED DISPATCH AND MAINT CTL, AND THE FLT RETURNED TO THE GATE AND THE ACFT WAS TAKEN OTS UNTIL ALL APPLICABLE CHANGES IN PERFORMANCE SPECS AND COCKPIT INSTRUMENTATION COULD BE MADE. DURING THE TIME THAT ACFT WAS IN SVC BTWN JUN/FRI/02 AND JUL/WED/02, 5 INDIVIDUAL FLTS WERE COMPLETED. I RELEASED 2 OF THE FLTS. THE CAUSE OF THIS PERFORMANCE DISCREPANCY WAS CAUSED BY TECHNICAL SVCS' FAILURE TO COMPLETE PAPERWORK AND CHKLISTS TO REFLECT THE CHANGE IN ENG CONFIGN. TECHNICAL SVCS REMAINS COMMITTED TO FINDING AN EFFECTIVE SOLUTION TO ENSURE THAT ENG CHANGES ARE RECORDED AND COMMUNICATED IN A TIMELY MANNER, AND DISPATCH REMAINS COMMITTED TO ASSISTING TECHNICAL SVCS IN EVENT MAY POSSIBLE.
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.