ASN Wikibase Occurrence # 361701
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| Date: | Saturday 10 July 1993 |
| Time: | 20:00 LT |
| Type: |  McDonnell Douglas DC-10-40 |
| Owner/operator: | Northwest Airlines |
| Registration: | N158US |
| MSN: | 46767/161 |
| Total airframe hrs: | 49826 hours |
| Engine model: | P&W JT9D-20J |
| Fatalities: | Fatalities: 0 / Occupants: 103 |
| Aircraft damage: | None |
| Category: | Serious incident |
| Location: | Detroit, MI -
 United States of America
|
| Phase: | En route |
| Nature: | Unknown |
| Departure airport: | |
| Boston, MA (KBOS) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
WHILE CLIMBING THROUGH 20,000 FEET THE #1 INS FAILED. THE GYRO OUTPUT VARIED AS THE GYRO TUMBLED, WHICH PRODUCED A BANK ANGLE SIGNAL. THE FAILURE MODE ALLOWED THE BANK ANGLE INFORMATION TO BE TRANSMITTED TO THE YAW FLIGHT GUIDANCE COMPUTER, ALLOWING THE ATTITUDE MONITORING AND SWITCHING UNIT TO MOVE THE LOWER RUDDER HYDRAULIC ACTUATOR, CAUSING THE LOWER RUDDER TO MOVE.
Probable Cause: the failure of a navigation system (#1 INS) for reason or reasons undetermined.
Accident investigation:
 |
|
Sources:
NTSB CHI93IA248
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 17-Mar-2024 06:49 | ASN Update Bot | Added |
Corrections or additions? ... Edit this accident description
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