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A B737-700 technician reports replacing the landing gear control lever switch which required special tooling not listed in the maintenance manual.
| Attributes | |
| ACN | 564192 |
| Time | |
| Date | 200210 |
| Day | Tue |
| Local Time Of Day | 1801 To 2400 |
| Place | |
| Locale Reference | airport : zzz.airport |
| State Reference | US |
| Altitude | agl single value : 0 |
| Environment | |
| Light | Night |
| Aircraft 1 | |
| Operator | common carrier : air carrier |
| Make Model Name | B737-700 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Qualification | technician : powerplant technician : airframe |
| ASRS Report | 564192 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | oversight : supervisor |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance non adherence : published procedure non adherence : far |
| Independent Detector | other other : person 1 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other other |
| Factors | |
| Maintenance | contributing factor : tooling contributing factor : manuals performance deficiency : repair |
| Supplementary | |
| Problem Areas | Company Maintenance Human Performance Chart Or Publication Aircraft |
| Primary Problem | Chart Or Publication |
| Situations | |
| Publication | MAINT MANUAL |
Narrative:
On oct/tue/02 I was issued a non routine written by technician foreman to replace S546. During removal of the lever arm of S546, much prying and pulling was required, after backing off the set screws that hold the arm in position on the switch shaft. Following replacement of the switch, we found instructions from the switch manufacturer (honeywell) that states 'caution -- do not pry on lever arm to remove. Use gear puller or damage to switch will occur.' we do not have this tool in stock, and the aircraft maintenance manual does not call for its use. This information was turned over to the supervisor to try and get gear pullers over to the supervisor to try and get gear pullers on order, and check into amm.
Original NASA ASRS Text
Title: A B737-700 TECHNICIAN RPTS REPLACING THE LNDG GEAR CTL LEVER SWITCH WHICH REQUIRED SPECIAL TOOLING NOT LISTED IN THE MAINT MANUAL.
Narrative: ON OCT/TUE/02 I WAS ISSUED A NON ROUTINE WRITTEN BY TECHNICIAN FOREMAN TO REPLACE S546. DURING REMOVAL OF THE LEVER ARM OF S546, MUCH PRYING AND PULLING WAS REQUIRED, AFTER BACKING OFF THE SET SCREWS THAT HOLD THE ARM IN POS ON THE SWITCH SHAFT. FOLLOWING REPLACEMENT OF THE SWITCH, WE FOUND INSTRUCTIONS FROM THE SWITCH MANUFACTURER (HONEYWELL) THAT STATES 'CAUTION -- DO NOT PRY ON LEVER ARM TO REMOVE. USE GEAR PULLER OR DAMAGE TO SWITCH WILL OCCUR.' WE DO NOT HAVE THIS TOOL IN STOCK, AND THE ACFT MAINT MANUAL DOES NOT CALL FOR ITS USE. THIS INFO WAS TURNED OVER TO THE SUPVR TO TRY AND GET GEAR PULLERS OVER TO THE SUPVR TO TRY AND GET GEAR PULLERS ON ORDER, AND CHK INTO AMM.
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.