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An MD88 released for service after an engineering authority/authorized for flight management work. Returned to field due to air data computer hoses not connected.
| Attributes | |
| ACN | 652818 |
| Time | |
| Date | 200503 |
| Local Time Of Day | 0601 To 1200 |
| 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 | MD-88 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance ground : takeoff roll |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Qualification | technician : powerplant technician : airframe |
| Experience | maintenance technician : 14 |
| ASRS Report | 652818 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Independent Detector | aircraft equipment other aircraft equipment : capt's a/s altimeter failed other flight crewa |
| Resolutory Action | flight crew : diverted to another airport flight crew : overcame equipment problem |
| Consequence | faa : investigated other |
| Factors | |
| Maintenance | contributing factor : work cards performance deficiency : testing performance deficiency : non compliance with legal requirements performance deficiency : inspection performance deficiency : installation performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Environmental Factor Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Upon working an engineering authority/authorized on an MD88 aircraft in the lower east&east compartment; for enhancing the FMS; I removed 2 lines for the pilot's air data computer and were unintentionally left off causing an air turn-back. These were removed with the intention of making the engineering authority/authorized a smoother operation. Upon removing the FMC (circuit breakers pulled and collared first); I noticed the pin hole for the new wiring was already utilized; so after notifying the aircraft maintenance coordinator; I returned to the aircraft and proceeded to return the aircraft to normal confign; forgetting about the removed lines for the air data computer. I cleaned up the area and closed the east&east compartment door. The aircraft was scheduled for a flight out of ZZZ. The aircraft did an air turn-back to the gate. It was found to have both pitot static lines removed from the air data computer.
Original NASA ASRS Text
Title: AN MD88 RELEASED FOR SVC AFTER AN ENGINEERING AUTH FOR FLT MGMNT WORK. RETURNED TO FIELD DUE TO ADC HOSES NOT CONNECTED.
Narrative: UPON WORKING AN ENGINEERING AUTH ON AN MD88 ACFT IN THE LOWER E&E COMPARTMENT; FOR ENHANCING THE FMS; I REMOVED 2 LINES FOR THE PLT'S ADC AND WERE UNINTENTIONALLY LEFT OFF CAUSING AN AIR TURN-BACK. THESE WERE REMOVED WITH THE INTENTION OF MAKING THE ENGINEERING AUTH A SMOOTHER OP. UPON REMOVING THE FMC (CIRCUIT BREAKERS PULLED AND COLLARED FIRST); I NOTICED THE PIN HOLE FOR THE NEW WIRING WAS ALREADY UTILIZED; SO AFTER NOTIFYING THE ACFT MAINT COORDINATOR; I RETURNED TO THE ACFT AND PROCEEDED TO RETURN THE ACFT TO NORMAL CONFIGN; FORGETTING ABOUT THE REMOVED LINES FOR THE ADC. I CLEANED UP THE AREA AND CLOSED THE E&E COMPARTMENT DOOR. THE ACFT WAS SCHEDULED FOR A FLT OUT OF ZZZ. THE ACFT DID AN AIR TURN-BACK TO THE GATE. IT WAS FOUND TO HAVE BOTH PITOT STATIC LINES REMOVED FROM THE ADC.
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.