20060207001499I

Incident · Minor damage

FAA incident report · Amtr Glasairiii · Oklahoma City, OK · February 7, 2006

Date: February 7, 2006 · 11:30 local
Place: Oklahoma City, OK
Airport: Wiley Post Airport
Phase of flight: Roll-Out (Fixed Wing)
Operating rules: General operating rules (Part 91)
Damage: Minor damage
Aircraft: N373RP
Reported as: Amtr Glasairiii
Reported engine: Lycoming IO540K1A5
People aboard: 1
Fatal injuries: 0
Pilot’s flight hours: 3,100 total1,500 in this make and model80 in the last 90 days

N373RPRegistered now · Funk P Funk B Kornelson R SH-3R GLASAIR IIIS/N 3212 · Built 2001 Airframe modelFunk P Funk B Kornelson R SH-3R GLASAIR III Engine modelLycoming IO-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.

(-23) The pilot stated that after landing during roll out when he applied the brakes the nose gear collapsed. The propeller and propeller spinner was damaged. The pilot was the only person aboard the aircraft. The pilot was not injured. The hydraulic actuator used to retract and extend the nose landing gear was observed to be leaking hydraulic fluid during operation. When the actuator was disassembled the piston seal was found to be torn and fluid was bypassing the piston during operation. The actuator did not produce the force necessary to overpower the air load exerted on the nose gear during flight. Hydraulic pressure in the actuator was low because the fluid bypassed the torn piston seal. The pressure dropped after the electric hydraulic pump was shut off. The actuator has approximately 400 hours of operation since the aircraft was built.

As the FAA filed it

(-23) THE PILOT STATED THAT AFTER LANDING DURING ROLL OUT WHEN HE APPLIED THE BRAKES THE NOSE GEAR COLLAPSED. THE PROPELLER AND PROPELLER SPINNER WAS DAMAGED. THE PILOT WAS THE ONLY PERSON ABOARD THE AIRCRAFT. THE PILOT WAS NOT INJURED. THE HYDRAULIC ACTUATOR USED TO RETRACT AND EXTEND THE NOSE LANDING GEAR WAS OBSERVED TO BE LEAKING HYDRAULIC FLUID DURING OPERATION. WHEN THE ACTUATOR WAS DISASSEMBLED THE PISTON SEAL WAS FOUND TO BE TORN AND FLUID WAS BYPASSING THE PISTON DURING OPERATION. THE ACTUATOR DID NOT PRODUCE THE FORCE NECESSARY TO OVERPOWER THE AIR LOAD EXERTED ON THE NOSE GEAR DURING FLIGHT. HYDRAULIC PRESSURE IN THE ACTUATOR WAS LOW BECAUSE THE FLUID BYPASSED THE TORN PISTON SEAL. THE PRESSURE DROPPED AFTER THE ELECTRIC HYDRAULIC PUMP WAS SHUT OFF. THE ACTUATOR HAS APPROXIMATELY 400 HOURS OF OPERATION SINCE THE AIRCRAFT WAS BUILT.