19980330004879A

Accident · Substantial damage

FAA accident report · Piper J5C · Valdez, AK · March 30, 1998

Date
March 30, 1998 · 14:20 local
Place
Valdez, AK
Airport
Valdez Airport
Phase of flight
Forced/Precautionary Landing
Operating rules
General operating rules (Part 91)
Damage
Substantial damage
Aircraft
N4769C
NTSB investigation
NTSBANC98LA033
Reported as
Piper J5C
Reported engine
Lycoming O290D2
People aboard
1
Fatal injuries
0
Pilot’s flight hours
3,381 total800 in this make and model12 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.

Recent overhaul engine quit on climbout. Collided with power line landing on hiway.(.4) on March 30, 1998, about 1420 Alaska standard time, a wheel equipped Piper J5-C airplane, N4769C, sustained substantial damage during a forced landing, about 2 miles southeast of Valdez, Alaska. The airplane was being operated as a visual flight rules (VFR) local area personal flight when the accident occurred. The airplane was owned and operated by the pilot. The certificated commercial pilot, the sole occupant, was not injured. Visual meteorological conditions prevailed. The flight originated at the Valdez Airport, about 1415. During a telephone conversation with the national transportation safety board (NTSB) investigator-in-charge (iic), on March 31, 1998, at 1055, the pilot, who is an aviation mechanic, reported he recently completed an engine overhaul on the accident airplane. The accident flight was the first flight since the overhaul. The pilot departed runway 06 at Valdez, and climbed to about 1,000 feet above the ground, when the engine suddenly quit running. He said he restarted the engine, but it only ran another 45 seconds before stopping again. The pilot selected an emergency landing area on a highway, but had to slip the airplane to avoid several vehicles on the highway. The airplane collided with a power line, about 25 feet above the ground. The airplane then descended to the ground and received damage to the right wing, the right wing spar, and the landing gear. On April 16, 1998, a federal aviation administration (FAA) airworthiness inspector, anchorage flight standards district office (FSDO), reported the pilot/mechanic had completed a disassembly of the engine. All of the engine cylinders were scored. The pilot had installed chrome cylinders, and during the assembly, he applied a coating of light grease to each engine cylinder bore. The engine then was temporarily stored before being installed on the accident airplane. According to the FAA inspector, the engine cylinders required an application of a thicker grease than what was used by the pilot. (-23) on the operational check flight after engine overhaul, the engine quit. A subsequent attempt to land on a highway failed when the aircraft struck power lines.

As the FAA filed it

RECENT OVERHAUL ENGINE QUIT ON CLIMBOUT. COLLIDED WITH POWER LINE LANDING ON HIWAY.(.4) ON MARCH 30, 1998, ABOUT 1420 ALASKA STANDARD TIME, A WHEEL EQUIPPED PIPER J5-C AIRPLANE, N4769C, SUSTAINED SUBSTANTIAL DAMAGE DURING A FORCED LANDING, ABOUT 2 MILES SOUTHEAST OF VALDEZ, ALASKA. THE AIRPLANE WAS BEING OPERATED AS A VISUAL FLIGHT RULES (VFR) LOCAL AREA PERSONAL FLIGHT WHEN THE ACCIDENT OCCURRED. THE AIRPLANE WAS OWNED AND OPERATED BY THE PILOT. THE CERTIFICATED COMMERCIAL PILOT, THE SOLE OCCUPANT, WAS NOT INJURED. VISUAL METEOROLOGICAL CONDITIONS PREVAILED. THE FLIGHT ORIGINATED AT THE VALDEZ AIRPORT, ABOUT 1415. DURING A TELEPHONE CONVERSATION WITH THE NATIONAL TRANSPORTATION SAFETY BOARD (NTSB) INVESTIGATOR-IN-CHARGE (IIC), ON MARCH 31, 1998, AT 1055, THE PILOT, WHO IS AN AVIATION MECHANIC, REPORTED HE RECENTLY COMPLETED AN ENGINE OVERHAUL ON THE ACCIDENT AIRPLANE. THE ACCIDENT FLIGHT WAS THE FIRST FLIGHT SINCE THE OVERHAUL. THE PILOT DEPARTED RUNWAY 06 AT VALDEZ, AND CLIMBED TO ABOUT 1,000 FEET ABOVE THE GROUND, WHEN THE ENGINE SUDDENLY QUIT RUNNING. HE SAID HE RESTARTED THE ENGINE, BUT IT ONLY RAN ANOTHER 45 SECONDS BEFORE STOPPING AGAIN. THE PILOT SELECTED AN EMERGENCY LANDING AREA ON A HIGHWAY, BUT HAD TO SLIP THE AIRPLANE TO AVOID SEVERAL VEHICLES ON THE HIGHWAY. THE AIRPLANE COLLIDED WITH A POWER LINE, ABOUT 25 FEET ABOVE THE GROUND. THE AIRPLANE THEN DESCENDED TO THE GROUND AND RECEIVED DAMAGE TO THE RIGHT WING, THE RIGHT WING SPAR, AND THE LANDING GEAR. ON APRIL 16, 1998, A FEDERAL AVIATION ADMINISTRATION (FAA) AIRWORTHINESS INSPECTOR, ANCHORAGE FLIGHT STANDARDS DISTRICT OFFICE (FSDO), REPORTED THE PILOT/MECHANIC HAD COMPLETED A DISASSEMBLY OF THE ENGINE. ALL OF THE ENGINE CYLINDERS WERE SCORED. THE PILOT HAD INSTALLED CHROME CYLINDERS, AND DURING THE ASSEMBLY, HE APPLIED A COATING OF LIGHT GREASE TO EACH ENGINE CYLINDER BORE. THE ENGINE THEN WAS TEMPORARILY STORED BEFORE BEING INSTALLED ON THE ACCIDENT AIRPLANE. ACCORDING TO THE FAA INSPECTOR, THE ENGINE CYLINDERS REQUIRED AN APPLICATION OF A THICKER GREASE THAN WHAT WAS USED BY THE PILOT. (-23) ON THE OPERATIONAL CHECK FLIGHT AFTER ENGINE OVERHAUL, THE ENGINE QUIT. A SUBSEQUENT ATTEMPT TO LAND ON A HIGHWAY FAILED WHEN THE AIRCRAFT STRUCK POWER LINES.

NTSB investigation

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