NASA · Aviation Safety Reporting System
Maintenance technician found un-installed engine bolt during maintenance troubleshooting due to jamb of engine twist grip.
What is ASRS?
The Aviation Safety Reporting System is NASA's voluntary, confidential, non- punitive incident-reporting system, established 1976. Pilots, controllers, dispatchers, and maintenance technicians file reports describing safety- relevant events. NASA de-identifies every report before adding it to the public database. Reports are not investigated by NASA, the FAA, or the NTSB — they represent the reporter's perspective.
Pilot narrative
Verbatim from the de-identified NASA record. First-person account by the
reporter. NASA strips identifying details (names, company, specific time);
anonymization placeholders are ZZZ,
X, Y.
Engine bolt located after jamb of #1 engine twist grip and subsequent trouble shooting with magnet in inaccessible area adjacent to engine idle cutoff inner bellcrank. Bolt appears to be un-installed with anti-seize present and no safety wire installed in head of 12-point engine bolt. Last engine maintenance in area Day 1 per documented maintenance records. Installation if engine verified. No other FOD found. Use of borescope, visually thru open panels, or magnet after disassembly/reassembly of engine components with performed.
NASA classification — Anomalies
- Aircraft Equipment Problem
- Deviation / Discrepancy - Procedural
NASA classification — Assessments
- Contributing Factors / Situations
- Aircraft · Human Factors
- Primary Problem
- Human Factors
ASRS reports are voluntarily submitted, de-identified by NASA, and represent the reporter's perspective. The presence of reports on a topic cannot be used to infer prevalence in the National Airspace System. The authoritative source is the NASA ASRS Database Online at asrs.arc.nasa.gov ↗.