- Date
- September 1, 1987, 05:58 local (12:58 UTC)
- Place
- Scottsdale, AZ
- Injuries
- 1 minor
- Damage
- Destroyed
- Phase of flight
- Maneuvering
- Aircraft
- N236HAHiller UH-12E
- Weather
- Visual (VMC) · Dawn
- Status
- Completed · report March 31, 1989
- Report
- Approved by Office Director
- FAA report
- 19870901054389A
- Case key
- 25315
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
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
During an aerial application flight, the plt made a turn-around & was starting to make another swath run when he heard a loud 'bang' & then the helicopter collided with terrain. An inspn of the main rotor head & pin revealed the hub had failed from hi cycle fatigue. The fatigue originated from a point in the hub pin bore where intergranular corrosion had occurred.
Aircraft
- Registration
- N236HA
- Reported as
- Hiller UH-12E
- Category
- Helicopter
- Serial number
- HA3063
- Engine
- Lycoming VO-540-C2A, 305 horsepower, reciprocating
- Damage
- Destroyed
- Flight
- Aerial application · Part 137
- Operator
- San Tan Dusters Inc.
- Registered owner
- Tiffany Ag Service Inc
- Airworthiness certificate
- Special, Restricted (Special)
- Last inspection
- 100 hour · June 5, 1987 · 97 hours before
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
- 28
- Certificate
- Commercial
- Medical
- Class 2, Valid Medical--no waivers/lim.
- Flight hours
- 3,011 total · 3,011 in this make and model · 3,011 as pilot in command · 287 in the last 90 days · 11 in the last 24 hours
Weather
- Conditions
- Visual (VMC) · Dawn
- Wind
- 80° at 8 knots
- Visibility
- 20 statute miles
- Lowest ceiling
- None
- Temperature
- 81 °F, dew point 54 °F
- Altimeter
- 30.00 inHg
- Observed at
- AFB, 20 nm away
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 N236HA · 1
Matched to the same aircraft by N-number and date.