ASN Wikibase Occurrence # 37087
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| Date: | Tuesday 16 June 1998 |
| Time: | 19:00 LT |
| Type: |  Aero Commander 680FL |
| Owner/operator: | Corporate Air |
| Registration: | N446JR |
| MSN: | 1325-10 |
| Year of manufacture: | 1964 |
| Total airframe hrs: | 17972 hours |
| Engine model: | Lycoming IO-720-B1B |
| Fatalities: | Fatalities: 1 / Occupants: 1 |
| Aircraft damage: | Destroyed |
| Category: | Accident |
| Location: | Helena, MT -
 United States of America
|
| Phase: | Approach |
| Nature: | Unknown |
| Departure airport: | Kallispell, MT (KFCA) |
| Helena, MT (KHLN) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The pilot of the Part 135 cargo flight was executing the 'full' ILS runway 27 approach at Helena Regional Airport in a non-radar environment. Although the approach calls for the pilot to maintain 7,000 feet until intercepting the glideslope, the aircraft impacted the terrain at 5,300 about 1.5 miles prior to reaching the point where the pilot should have crossed the Hauser NDB at an altitude of 6,741 feet. According to the approach plate, the aircraft should not have descended to an altitude below 5,400 feet until reaching the outer marker, which is located about five and one-half miles west of the impact site.
Probable Cause: The pilot's failure to maintain the correct altitude while turning inbound during a procedure turn to the ILS final approach course. Factors include hilly/mountainous terrain and clouds in the area where the course reversal was performed.
Accident investigation:
 |
|
Sources:
NTSB SEA98FA100
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 24-Oct-2008 10:30 | ASN archive | Added |
| 21-Dec-2016 19:23 | ASN Update Bot | Updated [Time, Damage, Category, Investigating agency] |
| 07-Apr-2024 10:58 | ASN Update Bot | Updated [Time, Other fatalities, Phase, Departure airport, Destination airport, Source, Narrative, Category, Accident report] |
Corrections or additions? ... Edit this accident description
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