19980705025629I

Incident · Minor damage

FAA incident report · Cessna A185F · Homer, AK · July 5, 1998

Date
July 5, 1998 · 14:00 local
Place
Homer, AK
Airport
Homer Airport
Phase of flight
Ground Taxi, Other Airplane
Operating rules
Air taxi and commuter (Part 135)
Operator
X53A
Damage
Minor damage
Aircraft
N3347L
NTSB investigation
NTSBANC98IA096
Reported as
Cessna A185F
People aboard
3
Fatal injuries
0
Pilot’s flight hours
5,776 total380 in this make and model127 in the last 90 days

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.

Right main gear broke turning off runway after landing. Gear ssent for analysis. (-5)on July 5, 1998, about 1400 Alaska daylight time, a wheel equipped Cessna 185 airplane, N3347L, sustained minor damage while taxiing at the Homer Airport, Homer, Alaska. The airplane was being operated as a visual flight rules (VFR) on demand passenger flight under title 14, CFR part 135, when the incident occurred. The certificated commercial pilot, and the two passengers aboard were not injured. Visual meteorological condition prevailed, and VFR company flight following procedures were in effect. The flight originated at the seldovia airport, seldovia, Alaska, about 1345. During a telephone conversation with the national transportation safety board investigator-in-charge on JULY5, the pilot reported that she had just landed on runway 21. She stated that after rollout she made a left turn to exit the runway, and the right main landing gear leg broke. The right wing struck the ground and sustained minor damage. A metallurgical inspection of the lower portion of the broken gear leg was conducted at the NTSB laboratory, and revealed fatigue crack origin sites within the upper attaching bolt hole walls. A scanning electron microscope (sem) examination revealed fatigue cracks initiating from multiple corrosion pits located within the bolt hole walls. Hardness test performed on the numbered face of the landing gear leg ranged form 42.3 to 51.2 hrc, with an average of 47 hrc. The specified hrc range is 48.3 to 50.0 hrc. The operator reported that on August 29, 1992, the incident airplane had been involved in a ground loop accident. The airplane sustained substantial damage, and was rebuilt over the next 6 years. The operator noted that while the airplane was undergoing repairs, both gear legs were removed and dye-penetrant inspection were performed. No anomalies were detected, and the gear legs were reinstalled, and placed back in service. She said that the broken gear leg had accumulated about 300 hours in service since the 1992 accident, and subsequent dye-penetrant inspection. She added ath prior to the 1992 ground loop accident, the airplane had been involved in extensive wheel/ski operations. At the present time, Cessna maintenance procedures do not have required inspection intervals or life limits on landing gear legs. Cessna 185 landing gear legs are con sidered "on condition" items.

As the FAA filed it

RIGHT MAIN GEAR BROKE TURNING OFF RUNWAY AFTER LANDING. GEAR SSENT FOR ANALYSIS. (-5)ON JULY 5, 1998, ABOUT 1400 ALASKA DAYLIGHT TIME, A WHEEL EQUIPPED CESSNA 185 AIRPLANE, N3347L, SUSTAINED MINOR DAMAGE WHILE TAXIING AT THE HOMER AIRPORT, HOMER, ALASKA. THE AIRPLANE WAS BEING OPERATED AS A VISUAL FLIGHT RULES (VFR) ON DEMAND PASSENGER FLIGHT UNDER TITLE 14, CFR PART 135, WHEN THE INCIDENT OCCURRED. THE CERTIFICATED COMMERCIAL PILOT, AND THE TWO PASSENGERS ABOARD WERE NOT INJURED. VISUAL METEOROLOGICAL CONDITION PREVAILED, AND VFR COMPANY FLIGHT FOLLOWING PROCEDURES WERE IN EFFECT. THE FLIGHT ORIGINATED AT THE SELDOVIA AIRPORT, SELDOVIA, ALASKA, ABOUT 1345. DURING A TELEPHONE CONVERSATION WITH THE NATIONAL TRANSPORTATION SAFETY BOARD INVESTIGATOR-IN-CHARGE ON JULY5, THE PILOT REPORTED THAT SHE HAD JUST LANDED ON RUNWAY 21. SHE STATED THAT AFTER ROLLOUT SHE MADE A LEFT TURN TO EXIT THE RUNWAY, AND THE RIGHT MAIN LANDING GEAR LEG BROKE. THE RIGHT WING STRUCK THE GROUND AND SUSTAINED MINOR DAMAGE. A METALLURGICAL INSPECTION OF THE LOWER PORTION OF THE BROKEN GEAR LEG WAS CONDUCTED AT THE NTSB LABORATORY, AND REVEALED FATIGUE CRACK ORIGIN SITES WITHIN THE UPPER ATTACHING BOLT HOLE WALLS. A SCANNING ELECTRON MICROSCOPE (SEM) EXAMINATION REVEALED FATIGUE CRACKS INITIATING FROM MULTIPLE CORROSION PITS LOCATED WITHIN THE BOLT HOLE WALLS. HARDNESS TEST PERFORMED ON THE NUMBERED FACE OF THE LANDING GEAR LEG RANGED FORM 42.3 TO 51.2 HRC, WITH AN AVERAGE OF 47 HRC. THE SPECIFIED HRC RANGE IS 48.3 TO 50.0 HRC. THE OPERATOR REPORTED THAT ON AUGUST 29, 1992, THE INCIDENT AIRPLANE HAD BEEN INVOLVED IN A GROUND LOOP ACCIDENT. THE AIRPLANE SUSTAINED SUBSTANTIAL DAMAGE, AND WAS REBUILT OVER THE NEXT 6 YEARS. THE OPERATOR NOTED THAT WHILE THE AIRPLANE WAS UNDERGOING REPAIRS, BOTH GEAR LEGS WERE REMOVED AND DYE-PENETRANT INSPECTION WERE PERFORMED. NO ANOMALIES WERE DETECTED, AND THE GEAR LEGS WERE REINSTALLED, AND PLACED BACK IN SERVICE. SHE SAID THAT THE BROKEN GEAR LEG HAD ACCUMULATED ABOUT 300 HOURS IN SERVICE SINCE THE 1992 ACCIDENT, AND SUBSEQUENT DYE-PENETRANT INSPECTION. SHE ADDED ATH PRIOR TO THE 1992 GROUND LOOP ACCIDENT, THE AIRPLANE HAD BEEN INVOLVED IN EXTENSIVE WHEEL/SKI OPERATIONS. AT THE PRESENT TIME, CESSNA MAINTENANCE PROCEDURES DO NOT HAVE REQUIRED INSPECTION INTERVALS OR LIFE LIMITS ON LANDING GEAR LEGS. CESSNA 185 LANDING GEAR LEGS ARE CON SIDERED "ON CONDITION" ITEMS.

NTSB investigation

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

Other reports on N3347L · 1

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