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A CRJ700 was dispatched with the incorrect nose gear steering manifold. Part ordered by previous shift.
| Attributes | |
| ACN | 689914 |
| Time | |
| Date | 200602 |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | Regional Jet 700 ER&LR |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | oversight : supervisor |
| ASRS Report | 689914 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : published procedure non adherence : far |
| Independent Detector | other other : 3 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : non availability of parts performance deficiency : logbook entry performance deficiency : non compliance with legal requirements performance deficiency : installation |
| Supplementary | |
| Problem Areas | Environmental Factor Maintenance Human Performance Aircraft Chart Or Publication |
| Primary Problem | Maintenance Human Performance |
Narrative:
On feb/fri/06 inbound flight #abcd; pilot reported 'arming nosewheel steering resulted in a loud humming noise and vibration from the nosewheel gear compartment.' crew troubleshot and changed pressure switch with no help. This crew isolated the discrepancy to the steering manifold. Parts were ordered and delivery time estimated at XA20. Aircraft was turned over to next crew at XA00 and aircraft was taxied to air carrier Y hangar for repairs. Around XA30; part arrived ZZZ and routed to aircraft. Steering manifold part #X was issued to aircraft through computer system and installed on aircraft with existing bracket part #Y. By aircraft serial effectivity; manifold part #Z matching existing bracket installed should have been ordered/installed for this aircraft. Mr X was the mechanic who signed for the steering manifold installation and operations checks. Callback conversation with reporter revealed the following information: the reporter stated the part was ordered on the previous shift through the computerized part system. To order parts on this system the aircraft tail number is entered and then the part number and if the part number and effectivity are correct the part is ordered. This time it slipped up!
Original NASA ASRS Text
Title: A CRJ700 WAS DISPATCHED WITH THE INCORRECT NOSE GEAR STEERING MANIFOLD. PART ORDERED BY PREVIOUS SHIFT.
Narrative: ON FEB/FRI/06 INBOUND FLT #ABCD; PLT RPTED 'ARMING NOSEWHEEL STEERING RESULTED IN A LOUD HUMMING NOISE AND VIBRATION FROM THE NOSEWHEEL GEAR COMPARTMENT.' CREW TROUBLESHOT AND CHANGED PRESSURE SWITCH WITH NO HELP. THIS CREW ISOLATED THE DISCREPANCY TO THE STEERING MANIFOLD. PARTS WERE ORDERED AND DELIVERY TIME ESTIMATED AT XA20. ACFT WAS TURNED OVER TO NEXT CREW AT XA00 AND ACFT WAS TAXIED TO ACR Y HANGAR FOR REPAIRS. AROUND XA30; PART ARRIVED ZZZ AND ROUTED TO ACFT. STEERING MANIFOLD PART #X WAS ISSUED TO ACFT THROUGH COMPUTER SYS AND INSTALLED ON ACFT WITH EXISTING BRACKET PART #Y. BY ACFT SERIAL EFFECTIVITY; MANIFOLD PART #Z MATCHING EXISTING BRACKET INSTALLED SHOULD HAVE BEEN ORDERED/INSTALLED FOR THIS ACFT. MR X WAS THE MECH WHO SIGNED FOR THE STEERING MANIFOLD INSTALLATION AND OPS CHKS. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE PART WAS ORDERED ON THE PREVIOUS SHIFT THROUGH THE COMPUTERIZED PART SYS. TO ORDER PARTS ON THIS SYS THE ACFT TAIL NUMBER IS ENTERED AND THEN THE PART NUMBER AND IF THE PART NUMBER AND EFFECTIVITY ARE CORRECT THE PART IS ORDERED. THIS TIME IT SLIPPED UP!
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.