NTSB Identification: MIA83FA197.
The docket is stored on NTSB microfiche number 23720.
Accident occurred Monday, August 08, 1983 in BRANDON, FL
Aircraft: PIPER PA-28-150, registration: N5888W
Injuries: 2 Serious.

NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.

THE ACFT COLLIDED WITH TREES AND THE GROUND AFTER THE ENGINE LOST POWER DURING TAKEOFF. THE CFI NOTED THE RPM DROPPING TO 2000 WITH FULL THROTTLE AND AT ABOUT 75 AGL AND TRIED TO ARREST THE DESCENT WITH FLAPS BUT WAS UNSUCCESSFUL. ONE TAKEOFF HAD BEEN ABORTED DUE TO POOR ACCELERATION BUT THE CFI HAD THOUGHT IT WAS IMPROPER THROTTLE TECHNIQUE ON THE PARTOF THE STUDENT. POST ACCIDENT ENGINE EXAMINATION REVEALED OLD TYPE VALVE SPRINGS INSTALLED THAT SHOULD HAVE BEEN REPLACED BY PN LW11800. A MECHANIC HAD INSTALLED NEW SPRINGS BUT OF AN INCORRECT TYPE WITH INCORRECT COLOR CODING. AVCO LYCOMING SERVICE INSTRUCTION 1240B CALLED FOR THE CHANGE TO IMPROVE ENGINE PERFORMANCE WITH THE RECOMMENDED IMPROVED VALVE SPRINGS.

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

ENGINE ASSEMBLY,VALVE,INTAKE..INCORRECT

The National Transportation Safety Board determines the probable cause(s) of this accident to be:

MAINTENANCE,INSTALLATION..IMPROPER..OTHER MAINTENANCE PERSONNEL


Contributing Factors

OBJECT..TREE(S)

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