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20121125027399I

Incident · Minor damage
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FAA incident report · Beech 95-A55 · Tucumcari, NM · November 25, 2012

FAA Aviation Safety Information Portal

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Date
November 25, 2012 · 10:02 local
Place
Tucumcari, NM
Airport
Tucumcari Regional
Phase of flight
Cruise/Level Flight
Operating rules
General operating rules (Part 91)
Damage
Minor damage
Aircraft
N169SP
Reported as
Beech 95-A55
Reported engine
TCM IO470-L
People aboard
4
Fatal injuries
0
Other injuries
0
Pilot’s certificates
Airline transport, commercial pilot, flight instructor
Pilot’s flight hours
8,500 total200 in this make and model30 in the last 90 days
N169SPRegistered now · Beech 95-A55S/N TC-353Airframe modelBeech 95-A55Engine modelContinental IO-470-LReciprocating

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.

On November 25, 2012 pilot in command (PIC) fueled 50 gallons of fuel in slaton, TX (F49) for a total of 100 gallons on board on his Beech baron, N169SP and departed for durango co (kdro)with 3 pax on board. While cruising in level flight,at 10,500 ft approximately 23 nautical miles south/southwest of Tucumcari airport (ktcc) pilot heard a loud bang, observed smoke coming out of RH engine, bulging of the RH ob engine cowl and lost oil pressure. PIC initiated emergency procedures and diverted to Tucumcari airport (ktcc) and made an uneventful single engine landing. Prior to that there were no abnormal engine indications. There was no additional damage to the aircraft and there were no injuries. Upon further investigation, the # 3 cylinder was found to be separated from the engine. There was damage to the piston, rings, cylinder base, studs and case. The forward lower stud was found in the oil pan with no cylinder base nut on it. The crank case cylinder boss showed signs of fretting/chafing that was centered at the forward lower cylinder base stud area. The cylinder skirt outside surface had matching scar marks. The engine (s/n 192042-7-L-R) had approximately 418 hours since last major overhaul. The engine was approved for return to service as airworthy at the last annual inspection, with no discrepancies noted, on 4/24/2012, tach time 1817.7 there were no other problems/defects with the engine during the inspection.

As the FAA filed it

ON NOVEMBER 25, 2012 PILOT IN COMMAND (PIC) FUELED 50 GALLONS OF FUEL IN SLATON, TX (F49) FOR A TOTAL OF 100 GALLONS ON BOARD ON HIS BEECH BARON, N169SP AND DEPARTED FOR DURANGO CO (KDRO)WITH 3 PAX ON BOARD. WHILE CRUISING IN LEVEL FLIGHT,AT 10,500 FT APPROXIMATELY 23 NAUTICAL MILES SOUTH/SOUTHWEST OF TUCUMCARI AIRPORT (KTCC) PILOT HEARD A LOUD BANG, OBSERVED SMOKE COMING OUT OF RH ENGINE, BULGING OF THE RH OB ENGINE COWL AND LOST OIL PRESSURE. PIC INITIATED EMERGENCY PROCEDURES AND DIVERTED TO TUCUMCARI AIRPORT (KTCC) AND MADE AN UNEVENTFUL SINGLE ENGINE LANDING. PRIOR TO THAT THERE WERE NO ABNORMAL ENGINE INDICATIONS. THERE WAS NO ADDITIONAL DAMAGE TO THE AIRCRAFT AND THERE WERE NO INJURIES.UPON FURTHER INVESTIGATION, THE # 3 CYLINDER WAS FOUND TO BE SEPARATED FROM THE ENGINE. THERE WAS DAMAGE TO THE PISTON, RINGS, CYLINDER BASE, STUDS AND CASE. THE FORWARD LOWER STUD WAS FOUND IN THE OIL PAN WITH NO CYLINDER BASE NUT ON IT. THE CRANK CASE CYLINDER BOSS SHOWED SIGNS OF FRETTING/CHAFING THAT WAS CENTERED AT THE FORWARD LOWER CYLINDER BASE STUD AREA. THE CYLINDER SKIRT OUTSIDE SURFACE HAD MATCHING SCAR MARKS.THE ENGINE (S/N 192042-7-L-R) HAD APPROXIMATELY 418 HOURS SINCE LAST MAJOR OVERHAUL.THE ENGINE WAS APPROVED FOR RETURN TO SERVICE AS AIRWORTHY AT THE LAST ANNUAL INSPECTION, WITH NO DISCREPANCIES NOTED, ON 4/24/2012, TACH TIME 1817.7 THERE WERE NO OTHER PROBLEMS/DEFECTS WITH THE ENGINE DURING THE INSPECTION.