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A B727-100 during preflight inspection found the #1 engine throttle binding caused by lack of adjustment after #1 thrust reverser replacement.
| Attributes | |
| ACN | 450635 |
| Time | |
| Date | 199909 |
| Day | Thu |
| 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 | B727-100 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : parked ground : maintenance |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | maintenance : inspector |
| Qualification | technician : powerplant technician : airframe technician : inspection authority |
| Experience | maintenance lead technician : 13 maintenance technician : 7 |
| ASRS Report | 450635 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp |
| Events | |
| Anomaly | maintenance problem : improper maintenance |
| Independent Detector | other flight crewa |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals contributing factor : work cards performance deficiency : repair performance deficiency : inspection performance deficiency : installation performance deficiency : testing |
| Supplementary | |
| Problem Areas | Maintenance Human Performance Aircraft |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | MAINT MAUNAL CHAPT 78 |
Narrative:
I was the inspector on a remove and replace (right&right) of the aircraft push-pull cable assembly on #1 engine thrust reverser. We remove and replace per the maintenance manual and accomplished the operations check. The aircraft returned back to the hangar when the pilot squawked that the #1 engine throttle binded during his preflight inspection. Maintenance found that the forward cable assembly on the push-pull assembly needed adjustment. After adjustment, the throttle operated without binding. The aircraft was returned to service. During initial maintenance on the aft portion of the push-pull assembly it was decided that the forward section rig didn't need to be checked because, the aft section remove and replace would have no effect on the rig because the aft section of the push-pull assembly cannot be adjusted. We open and closed the thrust reverser several times but did not push the throttle forward, thus missing the binding of the throttle.
Original NASA ASRS Text
Title: A B727-100 DURING PREFLT INSPECTION FOUND THE #1 ENG THROTTLE BINDING CAUSED BY LACK OF ADJUSTMENT AFTER #1 THRUST REVERSER REPLACEMENT.
Narrative: I WAS THE INSPECTOR ON A REMOVE AND REPLACE (R&R) OF THE ACFT PUSH-PULL CABLE ASSEMBLY ON #1 ENG THRUST REVERSER. WE REMOVE AND REPLACE PER THE MAINT MANUAL AND ACCOMPLISHED THE OPS CHK. THE ACFT RETURNED BACK TO THE HANGAR WHEN THE PLT SQUAWKED THAT THE #1 ENG THROTTLE BINDED DURING HIS PREFLT INSPECTION. MAINT FOUND THAT THE FORWARD CABLE ASSEMBLY ON THE PUSH-PULL ASSEMBLY NEEDED ADJUSTMENT. AFTER ADJUSTMENT, THE THROTTLE OPERATED WITHOUT BINDING. THE ACFT WAS RETURNED TO SVC. DURING INITIAL MAINT ON THE AFT PORTION OF THE PUSH-PULL ASSEMBLY IT WAS DECIDED THAT THE FORWARD SECTION RIG DIDN'T NEED TO BE CHKED BECAUSE, THE AFT SECTION REMOVE AND REPLACE WOULD HAVE NO EFFECT ON THE RIG BECAUSE THE AFT SECTION OF THE PUSH-PULL ASSEMBLY CANNOT BE ADJUSTED. WE OPEN AND CLOSED THE THRUST REVERSER SEVERAL TIMES BUT DID NOT PUSH THE THROTTLE FORWARD, THUS MISSING THE BINDING OF THE THROTTLE.
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.