- Date
- May 1, 2007, 17:00 local (May 2, 2007, 01:00 UTC)
- Place
- Haines, AK
- Injuries
- 4 uninjured
- Damage
- Substantial damage
- Phase of flight
- Landing
- Aircraft
- N185MCessna A185F
- Weather
- Visual (VMC) · Day
- Status
- Completed · report July 25, 2007
- Report
- Approved by Office Director
- NTSB office
- Alaska Regional Office
- Parties
- Juneau FSDO-05
- FAA report
- 20070501007469A
- Case key
- 65686
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Probable cause
The main landing gear attachment bolts to the right ski sheared during the landing roll in deep snow, resulting in a nose down, and structural damage to the right wing and aileron.
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The airplane was being operated by a mountain flying service delivering climbers and their equipment to a glacier base camp, under Title 14, CFR Part 135. The commercial certificated pilot said during the landing roll on the glacier, while turning to the left, the right ski loaded up with snow. He said the ski attachment to the right main landing gear broke, and the gear leg dug into the snow. The airplane nosed down, and the right wing struck the surface of the glacier, damaging the wing and aileron. The pilot said an examination of the landing gear revealed that the ski attaching bolts had sheared. He said he had made several trips to the glacier that day, and that there were no problems with the airplane or the landing gear prior to the accident.
Factual narrative
On May 1, 2007, about 1700 Alaska daylight time, a ski-equipped Cessna A185F airplane, N185M, sustained substantial damage when the right main landing gear broke while landing on a glacier, about 74 miles west of Haines, Alaska. The airplane was being operated by Mountain Flying Service, Haines, as a visual flight rules (VFR) on-demand passenger flight under Title 14, CFR Part 135, when the accident occurred. The commercial certificated pilot, and the three passengers were not injured. Visual meteorological conditions prevailed, and a VFR flight plan was filed. The flight departed the Haines Airport, Haines, about 1600.
During a telephone conversation with the National Transportation Safety Board (NTSB) investigator-in-charge (IIC) on May 2, the pilot said during the landing roll on the glacier, he started a left turn, and the right ski started loading up with snow. He said the ski attachment to the right landing gear broke, and the gear leg dug into the snow. He reported the airplane nosed down, and the right wing struck the surface of the glacier. The pilot said an examination of the landing gear revealed that the ski attaching bolts had sheared, and that the right wing and aileron received structural damage. He said he had made several trips to the glacier that day, and that there were no problems with the gear prior to the accident. Due to the remote location, the airplane was not examined by the NTSB.
Aircraft
- Registration
- N185M
- Reported as
- Cessna A185F
- Category
- Airplane
- Serial number
- 18504264
- Airframe hours
- 9,539
- Engine
- Continental IO-550-D, 300 horsepower, reciprocating
- Damage
- Substantial damage
- Flight
- Part 135
- Operator
- Mountain Flying Service, doing business as Mountain Flying Service
- Registered owner
- Paul Swanstrom
- Airworthiness certificate
- Standard, Normal
- Last inspection
- Annual · March 1, 2007
- Departed
- PAHN · Haines, AK
- Destination
- Haines, AK
- Flight plan
- VFR
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 52
- Injuries
- None
- Certificate
- Commercial
- Airplane ratings
- Single-engine land
- Instrument ratings
- Airplane
- Medical
- Class 2, Without waivers/limitations
- Last flight review
- April 1, 2007
- Seat
- Left
- Flight hours
- 7,700 total · 7,300 in this make and model · 37 in the last 90 days · 20 in the last 30 days · 5 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 10 statute miles
- Lowest ceiling
- None
- Temperature
- 39 °F
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N185M · 2
Matched to the same aircraft by N-number and date.