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A B737-800 right engine inlet cowling damage was evaluated by a contract technician using the srm. Found damage within limits.
| Attributes | |
| ACN | 645667 |
| Time | |
| Date | 200501 |
| 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 | B737-800 |
| Operating Under FAR Part | Part 121 |
| Flight Phase | ground : maintenance |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | other personnel other |
| Qualification | technician : fcc technician : repairman technician : powerplant technician : airframe |
| Experience | maintenance avionics : 28 maintenance lead technician : 3 maintenance repairman : 25 maintenance technician : 35 |
| ASRS Report | 645667 |
| Person 2 | |
| Affiliation | other |
| Function | maintenance : technician |
| Events | |
| Anomaly | aircraft equipment problem : critical maintenance problem : improper maintenance maintenance problem : improper documentation non adherence : far non adherence : published procedure |
| Independent Detector | other other : 4 |
| Resolutory Action | none taken : detected after the fact |
| Consequence | other other |
| Factors | |
| Maintenance | contributing factor : manuals performance deficiency : inspection performance deficiency : non compliance with legal requirements performance deficiency : logbook entry |
| Supplementary | |
| Problem Areas | Chart Or Publication Aircraft Maintenance Human Performance |
| Primary Problem | Maintenance Human Performance |
| Situations | |
| Publication | Structural Repair Manual |
Narrative:
Turnover at start of shift for discovery of right engine inlet cowl damage of aircraft X in ZZZ. Before this maintenance controller was able to research the srm completely; the contract technician called and said that the damage was within limits. Then he stated that we needed to defer the damage without giving any measurements. This led to misunderstanding and misinterp; because this controller believed that the contract technician was reading further into sections B and C instead of section 4A of srm 54-10-01. There was further miscom about allowable damage; but we decided that the damage was within srm limits. After aircraft departure from ZZZ and reconsideration of the srm; the shift manager and this controller elected to rechk the damage at ZZZ1. Rechked the damage at ZZZ1 and maintenance opted to replace the inlet cowl. The srm section 54-10-01 is not very clear on the allowable damage with the only measurements of X=1T and 20X between areas. Dents; nicks; and gouges should follow a more logical delineation with more definition.
Original NASA ASRS Text
Title: A B737-800 R ENG INLET COWLING DAMAGE WAS EVALUATED BY A CONTRACT TECHNICIAN USING THE SRM. FOUND DAMAGE WITHIN LIMITS.
Narrative: TURNOVER AT START OF SHIFT FOR DISCOVERY OF R ENG INLET COWL DAMAGE OF ACFT X IN ZZZ. BEFORE THIS MAINT CTLR WAS ABLE TO RESEARCH THE SRM COMPLETELY; THE CONTRACT TECHNICIAN CALLED AND SAID THAT THE DAMAGE WAS WITHIN LIMITS. THEN HE STATED THAT WE NEEDED TO DEFER THE DAMAGE WITHOUT GIVING ANY MEASUREMENTS. THIS LED TO MISUNDERSTANDING AND MISINTERP; BECAUSE THIS CTLR BELIEVED THAT THE CONTRACT TECHNICIAN WAS READING FURTHER INTO SECTIONS B AND C INSTEAD OF SECTION 4A OF SRM 54-10-01. THERE WAS FURTHER MISCOM ABOUT ALLOWABLE DAMAGE; BUT WE DECIDED THAT THE DAMAGE WAS WITHIN SRM LIMITS. AFTER ACFT DEP FROM ZZZ AND RECONSIDERATION OF THE SRM; THE SHIFT MGR AND THIS CTLR ELECTED TO RECHK THE DAMAGE AT ZZZ1. RECHKED THE DAMAGE AT ZZZ1 AND MAINT OPTED TO REPLACE THE INLET COWL. THE SRM SECTION 54-10-01 IS NOT VERY CLR ON THE ALLOWABLE DAMAGE WITH THE ONLY MEASUREMENTS OF X=1T AND 20X BTWN AREAS. DENTS; NICKS; AND GOUGES SHOULD FOLLOW A MORE LOGICAL DELINEATION WITH MORE DEFINITION.
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.