ASRS 2047663
ACN 2047663 · 2023-10 · Bell Helicopter 412
Maintenance technician found un-installed engine bolt during maintenance troubleshooting due to jamb of engine twist grip.
Pilot narrative
Verbatim, de-identified by NASA. Placeholders: 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 voluntary, de-identified by NASA, and represent the reporter's perspective; they are not investigated and cannot be used to infer prevalence. Authoritative source: asrs.arc.nasa.gov ↗