ASN Wikibase Occurrence # 365584
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| Date: | Monday 18 March 1991 |
| Time: | 14:00 LT |
| Type: |  Rockwell Commander 112B |
| Owner/operator: | Private |
| Registration: | N1241J |
| MSN: | 504 |
| Engine model: | LYCOMING IO-360-C1D6 |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Nederland, CO -
 United States of America
|
| Phase: | En route |
| Nature: | Private |
| Departure airport: | Broomfield, CO (KBJC) |
| Steamboat Sprin, CO | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
AS THE AIRPLANE ENTERED A MOUNTAIN PASS, THE PILOT NOTICED DECREASING ENGINE MANIFOLD PRESSURE. UNABLE TO CLEAR HIGHER TERRAIN, HE MADE A FORCED LANDING IN DEEP SNOW. POST-ACCIDENT EXAMINATION REVEALED THE RIGHT IGNITION HARNESS WAS DETERIORATED AND THE IGNITION LEADS HAD ARCED. THE LEFT IGNITION HARNESS (SLICK 1200 SERIES) HAD BEEN ALTERED WITH THE USE OF UNAPPROVED BENDIX 'PANCAKE' GROMMETS. THE AIRPLANE HAD FLOWN 129 HRS SINCE THE LAST ANNUAL INSPECTION. CONDITIONS PREVENTED RECOVERY OF THE WRECKAGE UNTIL 6/27/91. TOTAL TIME ON THE ENGINE WAS 1,714 HRS. RECOMMENDED OVERHAUL INTERVAL WAS 1,800 HRS.
Probable Cause: DETERIORATED IGNITION HARNESS AND IGNITION LEAD ARCING. FACTORS WERE THE HIGH DENSITY ALTITUDE AND LACK OF SUITABLE TERRAIN FOR THE FORCED LANDING.
Accident investigation:
 |
|
Sources:
NTSB DEN91LA053
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 20-Mar-2024 11:41 | ASN Update Bot | Added |
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