ASN Wikibase Occurrence # 370495
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| Date: | Wednesday 25 April 2001 |
| Time: | 19:15 LT |
| Type: |  Embraer EMB-145LR |
| Owner/operator: | Continental Express |
| Registration: | N29917 |
| MSN: | 145414 |
| Year of manufacture: | 2001 |
| Total airframe hrs: | 31 hours |
| Engine model: | Allison AE3100A1/3 |
| Fatalities: | Fatalities: 0 / Occupants: 53 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Norfolk, VA -
 United States of America
|
| Phase: | En route |
| Nature: | Passenger - Scheduled |
| Departure airport: | Newark-Liberty International Airport, NJ (EWR/KEWR) |
| Norfolk International Airport, VA (ORF/KORF) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
During cruise flight, the horizontal stabilizer jammed in the (-1)-degree trim position. After an uneventful landing, the elevator trim actuator was forwarded to the manufacturer for examination under the supervision of a Safety Board investigator. The elevator trim actuator contained a primary and back-up clutch gear, and each gear had a respective torque nut and lock washer. The examination revealed that that the tabs on the lock washers were not bent over into the locked position. Additionally, there was no evidence that the tabs had ever been bent into the locked position. The back-up clutch torque nut had backed off and down the shaft, coming to rest against the clutch gear cluster bearing outer race. The backed-off nut exhibited a scratch around the outer edge of the face, consistent with fouling against the clutch gear cluster bearing outer race, subsequently jamming the unit. The manufacturer identified the isolated error in the production process.
Probable Cause: The manufacturer's inadequate quality control, which resulted in a jammed elevator trim actuator.
Accident investigation:
 |
|
Sources:
NTSB NYC01IA107
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 25-Mar-2024 11:19 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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