37000 Feet | Browse and search NASA's Aviation Safety Reporting System |
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Attributes | |
ACN | 512899 |
Time | |
Date | 200105 |
Day | Wed |
Place | |
Locale Reference | airport : zzz.airport |
State Reference | US |
Aircraft 1 | |
Controlling Facilities | tower : zzz.tower |
Operator | common carrier : air carrier |
Make Model Name | MD-80 Series (DC-9-80) Undifferentiated or Other Model |
Operating Under FAR Part | Part 121 |
Flight Phase | ground : maintenance |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air carrier |
Function | maintenance : inspector |
ASRS Report | 512899 |
Person 2 | |
Affiliation | company : air carrier |
Function | other personnel other |
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 : person 1 |
Resolutory Action | none taken : detected after the fact |
Consequence | other other |
Factors | |
Maintenance | contributing factor : schedule pressure contributing factor : engineering procedure performance deficiency : repair performance deficiency : scheduled maintenance performance deficiency : non compliance with legal requirements |
Supplementary | |
Problem Areas | Chart Or Publication Maintenance Human Performance |
Primary Problem | Maintenance Human Performance |
Situations | |
Publication | STRUCTURAL REPAIR MANUAL |
Narrative:
Horizontal mount vertical lug plates were found not to be spot-faced for fastener installation. Supervision signed xx off, that it was not required per douglas drawing 3912033. On further research, found douglas drawing 9911834 requiring spot-face before fastener installation. Engineering issued XXXX dated may/xa/01 stating it is acceptable to install lug plates without spot-facing at fastener head locations provided that the hi-locks are installed per srm 51-30-5. Hi-locks were installed incorrectly. A hard set was used to seat hi-locks. Cadmium plating was chipped and heads of hi-locks are damaged (not per srm 51-30-5) due to installing a protruding head fastener onto a tapered steel surface without spot-facing tapered surface.
Original NASA ASRS Text
Title: AN MD80 WAS RELEASED FOR SVC IN NON COMPLIANCE WITH THE HORIZ STABILIZER VERT LUG PLATES INCORRECTLY REPAIRED.
Narrative: HORIZ MOUNT VERT LUG PLATES WERE FOUND NOT TO BE SPOT-FACED FOR FASTENER INSTALLATION. SUPERVISION SIGNED XX OFF, THAT IT WAS NOT REQUIRED PER DOUGLAS DRAWING 3912033. ON FURTHER RESEARCH, FOUND DOUGLAS DRAWING 9911834 REQUIRING SPOT-FACE BEFORE FASTENER INSTALLATION. ENGINEERING ISSUED XXXX DATED MAY/XA/01 STATING IT IS ACCEPTABLE TO INSTALL LUG PLATES WITHOUT SPOT-FACING AT FASTENER HEAD LOCATIONS PROVIDED THAT THE HI-LOCKS ARE INSTALLED PER SRM 51-30-5. HI-LOCKS WERE INSTALLED INCORRECTLY. A HARD SET WAS USED TO SEAT HI-LOCKS. CADMIUM PLATING WAS CHIPPED AND HEADS OF HI-LOCKS ARE DAMAGED (NOT PER SRM 51-30-5) DUE TO INSTALLING A PROTRUDING HEAD FASTENER ONTO A TAPERED STEEL SURFACE WITHOUT SPOT-FACING TAPERED SURFACE.
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.