20000812025889I

Incident · Minor damage

FAA incident report · Amtr SH-2R · Redding, CA · August 12, 2000

Date: August 12, 2000 · 12:22 local
Place: Redding, CA
Airport: Redding Municipal
Phase of flight: Forced/Precautionary Landing
Operating rules: General operating rules (Part 91)
Damage: Minor damage
Aircraft: N92RD
Reported as: Amtr SH2R
Reported engine: Lycoming IO360A1D6
People aboard: 1
Fatal injuries: 0
Pilot’s flight hours: 1,130 total900 in this make and model50 in the last 90 days

N92RDRegistered now · Davis Richard R SH-2RS/N 630 Airframe modelDavis Richard R SH-2R

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.

(-23) A/c pilot/owner richard davis stated in a phone conversation that the a/c lost power about 25 ft in the air on departing Redding airport. He attempted to re extend the landing gear and land on the remaining runway. The left main gear collapsed, resulting in minor damage to the a/c. the loss of power was due to an owner fabricated linkage on a butterfly valve in the aft air box. The linkage controls two butterfly's to direct air flow in the box. The failure caused both butterfly valve to close restricting engine inlet air flow and causing a loss of power. Damage according to observers involves the lower portion of the left gear leg and wheel, damage to the left wing tip and flap.

As the FAA filed it

(-23) A/C PILOT/OWNER RICHARD DAVIS STATED IN A PHONE CONVERSATION THAT THE A/C LOST POWER ABOUT 25 FT IN THE AIR ON DEPARTING REDDING AIRPORT. HE ATTEMPTED TO RE EXTEND THE LANDING GEAR AND LAND ON THE REMAINING RUNWAY. THE LEFT MAIN GEAR COLLAPSED, RESULTING IN MINOR DAMAGE TO THE A/C. THE LOSS OF POWER WAS DUE TO AN OWNER FABRICATED LINKAGE ON A BUTTERFLY VALVE IN THE AFT AIR BOX. THE LINKAGE CONTROLS TWO BUTTERFLY'S TO DIRECT AIR FLOW IN THE BOX. THE FAILURE CAUSED BOTH BUTTERFLY VALVE TO CLOSE RESTRICTING ENGINE INLET AIR FLOW AND CAUSING A LOSS OF POWER. DAMAGE ACCORDING TO OBSERVERS INVOLVES THE LOWER PORTION OF THE LEFT GEAR LEG AND WHEEL, DAMAGE TO THE LEFT WING TIP AND FLAP.