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| Date: | Tuesday 24 March 1998 |
| Time: | 17:00 LT |
| Type: |  Cessna T207A Turbo Stationair 8 II |
| Owner/operator: | Scenic Airlines, Inc. |
| Registration: | N73780 |
| MSN: | 20700628 |
| Total airframe hrs: | 10511 hours |
| Engine model: | Continental TSIO-520-M |
| Fatalities: | Fatalities: 0 / Occupants: 6 |
| Other fatalities: | 0 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | near Monument Valley, UT -
 United States of America
|
| Phase: | Unknown |
| Nature: | Unknown |
| Departure airport: | Monument Valley, UT |
| Page, AZ (KPGA) | |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The takeoff for the sightseeing flight seemed normal until approximately 500 feet agl. The pilot observed the airspeed decreasing and the manifold pressure drop from 36.5 inches to 23 inches. He turned the auxiliary fuel pump on and was unable to restart the engine. He performed a forced landing in rough, sandy terrain. Postcrash examination of the airplane revealed that the upper induction tube, which conducted compressed turbocharger intake air to the throttle body, was found separated at a rubber connecting sleeve approximately 10 inches prior to the throttle body. Scenic Airlines maintenance personnel had installed a remanufactured zero time engine on July 30, 1996. The T207A Information Manual did not provide abnormal operating procedures for continued engine operation following turbocharger failure. There is no current FAA requirement to include information regarding the proper operation of an airplane by the aircraft manufacturer in the event of a loss of compressed induction air while flying a turbocharged airplane.
Probable Cause: The engine's total power loss due to the induction air ducting separating because of inadequate maintenance by company personnel. Factors were the failure of the manufacturer to provide non-standard operating procedures in their airplane's information manual, and the failure of the FAA to require non-standard operating procedures in the manufacturer's airplane information manual; and the soft, sandy, unsuitable terrain on which to perform a forced landing.
Accident investigation:
 |
|
Sources:
NTSB FTW98FA157
Location
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 27-Nov-2011 10:59 | Andy | Added |
| 27-Nov-2011 11:23 | RobertMB | Updated [Time, Aircraft type, Cn, Operator, Total occupants, Location, Departure airport, Destination airport, Source, Narrative, ] |
| 27-Nov-2011 11:24 | RobertMB | Updated [Narrative, ] |
| 30-Jan-2013 02:15 | TB | Updated [Time, Aircraft type, Location, Source, Narrative, ] |
| 16-Dec-2016 15:40 | Dr. John Smith | Updated [Location, Departure airport, Destination airport, Embed code, ] |
| 23-Feb-2017 14:32 | TB | Updated [Date, Time, Aircraft type, Registration, Cn, Operator, Total occupants, Location, Country, Phase, Nature, Departure airport, Destination airport, Source, Embed code, Damage, Narrative, ] |
| 23-Feb-2017 17:27 | TB | Updated [Narrative, ] |
| 07-Apr-2024 14:17 | ASN Update Bot | Updated [Time, Operator, Other fatalities, Phase, Nature, Departure airport, Destination airport, Source, Narrative, Category, Accident report, ] |
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