[f-AA] FW: brain cramp - AD 95-05-05 ?

[Arecit]

Hi Mike,

Being a lazy biologist sort I tried a quick 'google' of "Rocker shaft boss" and this unfortunate NTSB report turned up, but it also quickly identified the specific AD also (under the full narrative link).  Nancie



"Airworthiness Directive (AD) 94-05-05 R1, published in 1994, was issued to prevent possible engine power loss and subsequent engine failure. The AD required that maintenance personnel inspect the cylinder rocker shaft bosses for cracks at the next cylinder removal from the engine or engine overhaul, whichever occurs first, after the effective date of the AD. A revised AD became effective in 1996."  

Taken from:

NTSB Identification: NYC03LA137. 
The docket is stored in the Docket Management System (DMS). Please contact Records Management Division 
14 CFR Part 91: General Aviation
Accident occurred Thursday, June 26, 2003 in Williamson, NY
Probable Cause Approval Date: 9/1/2004
Aircraft: Cessna 150F, registration: N8517G
Injuries: 2 Uninjured.
As the airplane was climbing, with the student pilot at the controls, the engine began to run rough. The certified flight instructor (CFI) took over the controls and elected to perform a forced landing to an apple orchard. During the forced landing, the left and right wings struck trees. The airplane came to rest upright. Examination of the engine revealed a fractured cylinder rocker shaft boss to the number one cylinder. The fracture was consistent with fatigue. An Airworthiness Directive, published in 1994, was issued to prevent possible engine power loss and subsequent engine failure. The AD required that maintenance personnel inspect the cylinder rocker shaft bosses for cracks at the next cylinder removal from the engine or engine overhaul, whichever occurs first, after the effective date of the AD. A revised AD became effective in 1996. Review of the airplane's engine maintenance records indicated that the last engine overhaul and cylinder removal was accomplished in 197
 7. 
The National Transportation Safety Board determines the probable cause(s) of this accident as follows: 
The failure of a rocker arm shaft boss, which resulted in a partial loss of power and subsequent forced landing. A factor was the unsuitable terrain. 
Full narrative available
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In a message dated 11/03/06 11:05:38 Eastern Standard Time, n2064e at provide.net writes:
Hey everyone, 

I miss typed the AD reference in an earlier post.  It is 94-05-05 R1 for 
rocker shaft boss inspection when the cylinder is removed or overhauled. 
Does not apply to A series engines.  Sorry for the confusion. 

Have fun storming the castle! 

Scott 

-----Original Message----- 
From: Mike+Kathy Meyer [mailto:fuselsausage at yahoo.com] 
Sent: Friday, November 03, 2006 9:17 AM 
To: n2064e at provide.net 
Subject: brain cramp - AD 95-05-05 ? 

Hi Scott, Buzz here... awake before sunrise on one of 
my nights off. 
 I'm trying to look up AD95-05-05, and I'm coming up 
with a blank.  Please jar my memory (remember the 
movie The Princess Bride ? ) 
 g'day 
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