- Date
- June 17, 1986, 10:30 local (17:30 UTC)
- Place
- Delano, CA
- Injuries
- 1 uninjured
- Damage
- Substantial damage
- Phase of flight
- Initial climb
- Aircraft
- N172ETHiller UH-12E
- Weather
- Visual (VMC) · Day
- Status
- Completed · report April 25, 1988
- Report
- Approved by Office Director
- FAA report
- 19860617081429A
- Case key
- 24866
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
The helicopter rotor blade delaminated shortly after departing the operator's north base at Delano, CA. The investigation determined the blade contained extensive voids on the bond line. The blade was rejected by the manufacturer as being unairworthy. The operator bought the blade in an as is condition. The operator could not produce any yellow serviceable tags. Investigator's could not determine who overhauled the blades.
Aircraft
- Registration
- N172ET
- Reported as
- Hiller UH-12E
- Category
- Helicopter
- Serial number
- HA3072
- Airframe hours
- 2,690
- Engine
- Allison 250-C20, 301 horsepower, turbo shaft
- Damage
- Substantial damage
- Flight
- Positioning · Part 91
- Registered owner
- San Joaquin Helicopters
- Airworthiness certificate
- Special, Restricted (Special)
- Last inspection
- 100 hour · March 11, 1986 · 100 hours before
- Destination
- RAL · Riverside, CA
- Airport
- DLO · Delano
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
- 42
- Certificate
- Commercial
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Right
- Flight hours
- 10,000 total · 300 in this make and model · 10,000 as pilot in command · 50 in the last 90 days
Weather
- Conditions
- Visual (VMC) · Day
- Wind
- Calm
- Visibility
- 15 statute miles
- Lowest ceiling
- None
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 N172ET · 2
Matched to the same aircraft by N-number and date.