2 Hour Starter Cooling Period - Really?
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2 Hour Starter Cooling Period - Really?
Reading the latest issue of Callback, there was a mention of the starter cooling time required for Premier 1. Two long hours. I am used to ten minutes. I hope not too many aircraft have such a long cooling requirement.
"Part 91 – Never a Dull MomentAttempting the test run to complete a seemingly unrelated repair on a Premier 1 aircraft, this AMT discovered a second problem and a much larger surprise.
■ Company Service Center [was] notified of hydraulic seal failure on Aircraft X. Company mobile service unit began addressing/performing maintenance; determining a filter seal located on the hydraulic power unit had failed. Company mobile service provider/mechanic, after assembling the aircraft hydraulic unit [and] prior to test running…notices he had left [the] aircraft generator in “ON” position overnight causing aircraft main battery to result in insufficient voltage to power aircraft. GPU (Ground Power Unit) was then used for unknown attempts for starting right engine. Starting sequence for Aircraft X is 2 attempts then 2 hours for cooling prior [to] a third attempt. …mechanic reports right engine N2 only spooling up to 24% N2 after inducing fuel. Company asked company mechanic to perform a borescope to the right engine. The borescope that Company performed indicated that the #2 turbine was missing fins to the internal component. …Company 2 determined that the engine was to be removed and sent to manufacturer for repair."
"Part 91 – Never a Dull MomentAttempting the test run to complete a seemingly unrelated repair on a Premier 1 aircraft, this AMT discovered a second problem and a much larger surprise.
■ Company Service Center [was] notified of hydraulic seal failure on Aircraft X. Company mobile service unit began addressing/performing maintenance; determining a filter seal located on the hydraulic power unit had failed. Company mobile service provider/mechanic, after assembling the aircraft hydraulic unit [and] prior to test running…notices he had left [the] aircraft generator in “ON” position overnight causing aircraft main battery to result in insufficient voltage to power aircraft. GPU (Ground Power Unit) was then used for unknown attempts for starting right engine. Starting sequence for Aircraft X is 2 attempts then 2 hours for cooling prior [to] a third attempt. …mechanic reports right engine N2 only spooling up to 24% N2 after inducing fuel. Company asked company mechanic to perform a borescope to the right engine. The borescope that Company performed indicated that the #2 turbine was missing fins to the internal component. …Company 2 determined that the engine was to be removed and sent to manufacturer for repair."
