ASN Wikibase Occurrence # 293515
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| Date: | Friday 1 July 2005 |
| Time: | 13:50 LT |
| Type: |  Robinson R22 Beta |
| Owner/operator: | Sun Aero Helicopters Inc. |
| Registration: | N997SA |
| MSN: | 1029 |
| Year of manufacture: | 1989 |
| Total airframe hrs: | 2398 hours |
| Engine model: | Lycoming O-320-B2C |
| Fatalities: | Fatalities: 0 / Occupants: 2 |
| Aircraft damage: | Substantial |
| Category: | Accident |
| Location: | Crete, Illinois -
 United States of America
|
| Phase: | Unknown |
| Nature: | Training |
| Departure airport: | Chicago-Lansing Municipal Airport, IL (KIGQ) |
| Investigating agency: | NTSB |
| Confidence Rating: |  Accident investigation report completed and information captured |
The helicopter sustained substantial damage following an in-flight fire, hard landing, and subsequent ground fire. The pilot's accident report stated, "We were flying ... when I noticed clutch light on. The light stayed on for longer than 7 [seconds] and my decision was to pull clutch circuit breaker to save other belt. I took over the controls when the clutch light went on and I started to set my self up for emergency landing. ... At the same time I noticed smoke inside the cockpit and the smoke was filling inside fast. ... At about 1100 MSL I noticed low rpm light and horn went on, so I lowered the collective and entered autorotation. ... We exited the aircraft and could see the flames above the belts about 3 feet tall." Burnt pieces of alternator and drive belts were recovered from the site. A separated section of a recovered drive belt measured about a foot in length. The bottom quarter of the dipstick had oil on it when removed. The oil cooler exhibited damage on its lower and inboard surfaces, along the aft edge. The lower aft corner of the cooler was separated at its seam there. A dark media covered the engine in the area adjacent to the oil cooler. An oil like media was found on the tail rotor's guard and on the vertical stabilizer. The tailcone was burned away at its forward end. No pre-impact failures of the flight control system were found. The landing gear exhibited downward yielding.
Probable Cause: The separation of the drive belt, during cruise, leading to the puncturing of the oil cooler and subsequent fire. An additional cause was the pilot's restricted lookout during the emergency landing resulting in the hard landing.
Accident investigation:
 |
|
Sources:
NTSB CHI05LA173
Revision history:
| Date/time | Contributor | Updates |
|---|---|---|
| 10-Oct-2022 07:07 | ASN Update Bot | Added |
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