B737-200 JT8D acceleration times
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Joined: Jun 2000
Aviation Qualifications: ATP+Mil
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From: Australia
B737-200 JT8D acceleration times
I recall that after the British Air Tours accident at Manchester many years ago, Boeing (or was it Pratt and Whitney?) published a Bulletin to the effect that fuel on to light up times and slow acceleration from idle to 1.4 EPR could indicate a defect similar to that which caused the BAT accident (burner can cracking and then uncontained engine failure problem)
The Bulletin required crews to report as a defect if both engines spool up from idle to 1.4 EPR outside a three second spread from each other. Also if acceleration from light up to stable idle exceeded 30 seconds it was a defect that had to be recorded.
As that was over 20 years ago, and certain engine mods were carried out to prevent another occurrence, I wondered if this 3 second parameter between the two engines from idle to 1.4 EPR, and the max of 30 seconds from light up to idle rpm was still current or not? I appreciate some operators may leave those notes in place as a matter of precaution, but my question is aimed at confirming whether or not Boeing or P&W still require it or not.
Study of the latest Boeing FCOM for the B737-200 does not reveal any sign of a Bulletin or any note in the contents as it applies to engine start times or engine spool up times.
I would greatly appreciate any factual information. .
The Bulletin required crews to report as a defect if both engines spool up from idle to 1.4 EPR outside a three second spread from each other. Also if acceleration from light up to stable idle exceeded 30 seconds it was a defect that had to be recorded.
As that was over 20 years ago, and certain engine mods were carried out to prevent another occurrence, I wondered if this 3 second parameter between the two engines from idle to 1.4 EPR, and the max of 30 seconds from light up to idle rpm was still current or not? I appreciate some operators may leave those notes in place as a matter of precaution, but my question is aimed at confirming whether or not Boeing or P&W still require it or not.
Study of the latest Boeing FCOM for the B737-200 does not reveal any sign of a Bulletin or any note in the contents as it applies to engine start times or engine spool up times.
I would greatly appreciate any factual information. .




