- Date
- September 1, 1971
- Place
- Grnd Canyon, AZ · GRND CANYON, AZ
- Injuries
- 1 minor, 3 uninjured
- Damage
- Destroyed
- Phase of flight
- Initial climb
- Aircraft
- N90486Hiller Acft UH12L4
- Status
- Completed · report May 23, 1972
- Report
- Brief approved by the director
- Safety recommendations
- Yes
- Case key
- 79867
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
NTSB brief
NTSB’s brief of the accident, as it was printed: the coded facts, with the probable cause and factors.
---------------------------------------------------------------------------------------------------------------------------- FILE DATE LOCATION AIRCRAFT DATA INJURIES FLIGHT PILOT DATA F S M/N PURPOSE ---------------------------------------------------------------------------------------------------------------------------- 3-3835 71/9/1 GRND CANYON,ARIZ HILLER ACFT UH12L4 CR- 0 0 1 COMMERCIAL COMMERCIAL, AGE 25, 2140 TIME - 0945 N90486 PX- 0 0 3 CTR PASSG-D TOTAL HOURS, 32 IN TYPE, DAMAGE-DESTROYED OT- 0 0 0 NOT INSTRUMENT RATED. NAME OF AIRPORT - GRAND CANYON DEPARTURE POINT INTENDED DESTINATION GRAND CANYON,ARIZ LOCAL TYPE OF ACCIDENT PHASE OF OPERATION COLLISION WITH GROUND/WATER: CONTROLLED TAKEOFF: INITIAL CLIMB PROBABLE CAUSE(S) PILOT IN COMMAND - FAILED TO MAINTAIN ADEQUATE ROTOR R.P.M. FACTOR(S) WEATHER - HIGH DENSITY ALTITUDE SKY CONDITION CEILING AT ACCIDENT SITE CLEAR UNLIMITED VISIBILITY AT ACCIDENT SITE PRECIPITATION AT ACCIDENT SITE 5 OR OVER(UNLIMITED) NONE OBSTRUCTIONS TO VISION AT ACCIDENT SITE TEMPERATURE-F NONE 72 WIND DIRECTION-DEGREES WIND VELOCITY-KNOTS 220 4 TYPE OF WEATHER CONDITIONS TYPE OF FLIGHT PLAN VFR NONE FIRE AFTER IMPACT REMARKS- DSTY ALT 8900,DURG TKOF PLT LOST ROTOR RPM,R SKID BROKE OFF,ACFT ROLLED OVER,FIRE BROKE OUT.
Aircraft
- Registration
- N90486
- Reported as
- Hiller Acft UH12L4
- Category
- Helicopter
- Engine
- reciprocating
- Damage
- Destroyed
- Airport
- Grand Canyon
N90486Registration cancelled Feb 4, 2017 · Hiller UH-12L4Airframe modelHiller UH-12L4Engine modelLycoming VO-540 series
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.