Incident · 2011-01-19
What the record says
- Event date
- 2011-01-19
- Event type
- Incident
- Highest injury level
- No injuries
- Aircraft
- SIKORSKY 92 (N920AL)
- Operating rule
- Part 135
- Operator
- Bristow U.S. LLC Operator named in NTSB report
- Operated by (per NTSB report)
- BRISTOW US LLC
Probable cause
The misalignment of the retaining washer during routine maintenance, resulting in the subsequent separation of the washer and nut.
Source: NTSB case CEN11IA156Flight crew
Certification and experience as recorded in the NTSB accident database for this event. The NTSB records these facts about the crew's flying history; GroundCheck shows them as filed, without names or identities.
| Role | Certificate | Instrument rating | Age | Medical | Flight hours |
|---|---|---|---|---|---|
| Pilot | Airline transport pilot / Commercial | Helicopter | 63 | Class 2 (2010-06-30) | 33,647 total · 624 in this make/model · 23,485 as PIC · 70 last 90 days |
| Co-pilot | Airline transport pilot / Commercial | Helicopter | 64 | Class 1 (2010-08-16) | 21,677 total · 799 in this make/model · 14,040 as PIC · 55 last 90 days |
Facts as the NTSB records them — GroundCheck adds no judgement. Preliminary records may be revised as the investigation proceeds.