Narrative:

On 11/mon/89, I inspected an small transport in accordance with a 100 hour inspection. On 11/fri/89, during a flight from F67 to floydada municipal airport, the PIC said that while cruising at approximately 6000' MSL at night, that a loud bang was heard from the right side of the aircraft. He told me that he thought the aircraft had taken a bird strike. He examined the exterior of the aircraft from the cockpit with a flashlight, and the only damage he could see was that the spinner was missing from the right propeller. He said that there was no vibration that could be felt in the airframe. Shortly after that, the right propeller separated from the engine and struck the right side of the fuselage. There was a complete loss of electrical power. The aircraft was flown directly to floydada municipal airport. The best performance that could be obtained was a 200 FPM descent, and when the airspeed was reduced to near blue line (vyse), 100 mph, a severe vibration was felt in the airframe. An emergency landing gear extension was attempted, but the gear could not be manually cranked down quickly enough, while attempting to make it to the runway at floydada. The 4 occupants of the aircraft were uninjured after a successful gear-up landing. During the 100 hour inspection, the spinner was removed and the propeller was inspected. There was no evidence of a defect in the propeller attachment to the engine crankshaft. All safeties were intact. The spinner was reinstalled and all fasteners were secured. No ad's were noted for extra inspection of the area. All work on this aircraft was done to the best standards and inspection was very detailed due to the age of this aircraft. The propeller was new '0' time, installed in 3/89. The propeller had approximately 130 hours of time on it since new.

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Original NASA ASRS Text

Title: AN OLDER LIGHT TWIN LOST RIGHT SPINNER AND PROPELLER AT CRUISE ALT. PILOT WAS ABLE TO LAND AT AN ARPT, BUT COULD NOT EXTEND GEAR.

Narrative: ON 11/MON/89, I INSPECTED AN SMT IN ACCORDANCE WITH A 100 HR INSPECTION. ON 11/FRI/89, DURING A FLT FROM F67 TO FLOYDADA MUNI ARPT, THE PIC SAID THAT WHILE CRUISING AT APPROX 6000' MSL AT NIGHT, THAT A LOUD BANG WAS HEARD FROM THE RIGHT SIDE OF THE ACFT. HE TOLD ME THAT HE THOUGHT THE ACFT HAD TAKEN A BIRD STRIKE. HE EXAMINED THE EXTERIOR OF THE ACFT FROM THE COCKPIT WITH A FLASHLIGHT, AND THE ONLY DAMAGE HE COULD SEE WAS THAT THE SPINNER WAS MISSING FROM THE RIGHT PROP. HE SAID THAT THERE WAS NO VIBRATION THAT COULD BE FELT IN THE AIRFRAME. SHORTLY AFTER THAT, THE RIGHT PROP SEPARATED FROM THE ENG AND STRUCK THE RIGHT SIDE OF THE FUSELAGE. THERE WAS A COMPLETE LOSS OF ELECTRICAL PWR. THE ACFT WAS FLOWN DIRECTLY TO FLOYDADA MUNI ARPT. THE BEST PERFORMANCE THAT COULD BE OBTAINED WAS A 200 FPM DSCNT, AND WHEN THE AIRSPD WAS REDUCED TO NEAR BLUE LINE (VYSE), 100 MPH, A SEVERE VIBRATION WAS FELT IN THE AIRFRAME. AN EMER LNDG GEAR EXTENSION WAS ATTEMPTED, BUT THE GEAR COULD NOT BE MANUALLY CRANKED DOWN QUICKLY ENOUGH, WHILE ATTEMPTING TO MAKE IT TO THE RWY AT FLOYDADA. THE 4 OCCUPANTS OF THE ACFT WERE UNINJURED AFTER A SUCCESSFUL GEAR-UP LNDG. DURING THE 100 HR INSPECTION, THE SPINNER WAS REMOVED AND THE PROP WAS INSPECTED. THERE WAS NO EVIDENCE OF A DEFECT IN THE PROP ATTACHMENT TO THE ENG CRANKSHAFT. ALL SAFETIES WERE INTACT. THE SPINNER WAS REINSTALLED AND ALL FASTENERS WERE SECURED. NO AD'S WERE NOTED FOR EXTRA INSPECTION OF THE AREA. ALL WORK ON THIS ACFT WAS DONE TO THE BEST STANDARDS AND INSPECTION WAS VERY DETAILED DUE TO THE AGE OF THIS ACFT. THE PROP WAS NEW '0' TIME, INSTALLED IN 3/89. THE PROP HAD APPROX 130 HRS OF TIME ON IT SINCE NEW.

Data retrieved from NASA's ASRS site as of August 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.