Incident · 2003-04-01
What the record says
- Event date
- 2003-04-01
- Event type
- Incident
- Highest injury level
- No injuries
- Aircraft
- Boeing 747-422 (N175UA)
- Operating rule
- Part 121
- Operator
- UNITED AIRLINES, INC. Operator named in NTSB report
- Operated by (per NTSB report)
- United Airlines Inc
Probable cause
Failure of company maintenance personnel to fully comply with published maintenance/inspection procedures, as well as the resulting inoperative drain heaters and restricted movement of the aileron control cables. Contributing factors were the impeded waste water drain system due to the inoperative heaters and the reduced aileron control due to restricted movement of the control cables.
Source: NTSB case CHI03IA097Flight crew
Flight-crew details for this event aren't in the NTSB database extract we hold (its coverage starts with 2008 events) — a gap in our data, not an absence of crew.
Facts as the NTSB records them — GroundCheck adds no judgement. Preliminary records may be revised as the investigation proceeds.