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Mechanic working a dhc-8-200 #2 stall warning would not test write-up; inadvertently pulled and collared the #1 stall warning transducer and heater. Aircraft returned to field and #2 stall warning and heater MEL complied with.
| Attributes | |
| ACN | 807757 |
| Time | |
| Date | 200810 |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Dash 8-200 |
| Operating Under FAR Part | Part 121 |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| ASRS Report | 807757 |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : non compliance with mel maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other other : 1 |
| Resolutory Action | none taken : detected after the fact |
| Factors | |
| Maintenance | performance deficiency : non compliance with legal requirements performance deficiency : installation |
| Supplementary | |
| Problem Areas | Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
Narrative:
Aircraft arrived in ZZZ at approximately XA00 and was scheduled for a maintenance check. While performing check; the crew notified me they had a write-up regarding stall warning 2 would not test. The check was completed and I deferred the #2 stall warning in accordance with MEL procedure 27-3. MEL calls out to pull circuit breaker's stall warning and heater and stall transducer heater for the affected side. I pulled and collared stall transducer and heater #1 instead of #2. Aircraft returned to field and we corrected the problem. I did not pay attention to detail. #1 and #2 stall transducer heater #1 and #2 are on same row on aircraft circuit breaker panel and I pulled the wrong one.
Original NASA ASRS Text
Title: MECHANIC WORKING A DHC-8-200 #2 STALL WARNING WOULD NOT TEST WRITE-UP; INADVERTENTLY PULLED AND COLLARED THE #1 STALL WARNING TRANSDUCER AND HEATER. AIRCRAFT RETURNED TO FIELD AND #2 STALL WARNING AND HEATER MEL COMPLIED WITH.
Narrative: ACFT ARRIVED IN ZZZ AT APPROX XA00 AND WAS SCHEDULED FOR A MAINT CHK. WHILE PERFORMING CHK; THE CREW NOTIFIED ME THEY HAD A WRITE-UP REGARDING STALL WARNING 2 WOULD NOT TEST. THE CHK WAS COMPLETED AND I DEFERRED THE #2 STALL WARNING IN ACCORDANCE WITH MEL PROC 27-3. MEL CALLS OUT TO PULL CIRCUIT BREAKER'S STALL WARNING AND HEATER AND STALL TRANSDUCER HEATER FOR THE AFFECTED SIDE. I PULLED AND COLLARED STALL TRANSDUCER AND HEATER #1 INSTEAD OF #2. ACFT RETURNED TO FIELD AND WE CORRECTED THE PROB. I DID NOT PAY ATTN TO DETAIL. #1 AND #2 STALL TRANSDUCER HEATER #1 AND #2 ARE ON SAME ROW ON ACFT CIRCUIT BREAKER PANEL AND I PULLED THE WRONG ONE.
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.