20100202026659A

Accident · Substantial damage

FAA accident report · Hiller UH-12E · Los Banos, CA · February 2, 2010

Date: February 2, 2010 · 14:45 local
Place: Los Banos, CA
Phase of flight: Landing: Touchdown
Operating rules: Agricultural (Part 137)
Operator: JF5G
Damage: Substantial damage
Aircraft: N36MV
NTSB investigation: NTSBWPR10LA127
Reported as: Hiller UH-12E
Reported engine: Lycoming VO-540 series
People aboard: 1
Fatal injuries: 0
Other injuries: 0
Pilot’s flight hours: 0 total0 in this make and model0 in the last 90 days

N36MVRegistration cancelled Mar 1, 2018 · Hiller UH-12ES/N 5060 · Built 1978 Airframe modelHiller UH-12E Engine modelLycoming VO-540 seriesReciprocating

From the FAA’s Accident/Incident Data System (AIDS), through its Aviation Safety Information Portal, as reported. The NTSB investigates accidents separately, and its record of an accident is the fuller one. The aircraft is matched to the registry by N-number and event date, checked against the reported make and model; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.

What happened

The FAA’s narrative, in sentence case. The FAA writes it in capitals and removes private details.

When returning to the load truck after completion of an aerial application the pilot noticed that his throttle did not respond. The pilot was at an altitude of 50 ft when he noticed the loss of throttle control. The aircraft engine was slowly loosing engine RPM. The pilot lowered the collective and started to flare to stop the forward movement. The aircraft tail rotor made contact with the surface first followed by a hard impact on the landing gear. The aircraft bounced and rolled on it side. The investigation revealed that a bolt who connects the throttle linkages together was missing, making power inputs of the pilot to the engine impossible.

As the FAA filed it

WHEN RETURNING TO THE LOAD TRUCK AFTER COMPLETION OF AN AERIAL APPLICATION THE PILOT NOTICED THAT HIS THROTTLE DID NOT RESPOND. THE PILOT WAS AT AN ALTITUDE OF 50 FT WHEN HE NOTICED THE LOSS OF THROTTLE CONTROL. THE AIRCRAFT ENGINE WAS SLOWLY LOOSING ENGINE RPM. THE PILOT LOWERED THE COLLECTIVE AND STARTED TO FLARE TO STOP THE FORWARD MOVEMENT. THE AIRCRAFT TAIL ROTOR MADE CONTACT WITH THE SURFACE FIRST FOLLOWED BY A HARD IMPACT ON THE LANDING GEAR. THE AIRCRAFT BOUNCED AND ROLLED ON IT SIDE. THE INVESTIGATION REVEALED THAT A BOLT WHO CONNECTS THE THROTTLE LINKAGES TOGETHER WAS MISSING, MAKING POWER INPUTS OF THE PILOT TO THE ENGINE IMPOSSIBLE.

NTSB investigation

The NTSB’s investigation of this event, with its probable cause and findings. Matched to this report by N-number and date.

NTSB WPR10LA127Accident · No injuriesLimited investigationFinal reportLos Banos, CAA partial loss of engine power due to a failure of the throttle interconnect hardware, which resulted in a hard landing.Feb 2, 2010 · Substantial damage

Other reports on N36MV · 1

Matched to the same aircraft by N-number and date.

Accident 20131209023649ACruise/Level Flight · Madera, CAThe aircraft was performing agricultural flight operations, frost control, when the torsional coupling failed. Being at low altitude, the RPM went quickly resulting in a hard landing. The main rotor made contact with the tail boom, the skids were damaged, the…Dec 9, 2013 · Substantial damage