An item in the The World section, “Battery Smoke Grounds 787” (AW&ST Jan. 20, p. 12) lists one symptom that was corrected, but the matter of overloading the battery remains. Why during flight test does the auxiliary power unit (APU) work fine, but a well-used APU in service overloads the battery? As a retired TWA mechanic, I offer these factors for consideration: •Fuel temperatures aboard a recently landed aircraft after a 10-15-hr. flight will be -40F (kerosene @ 60F is hard ...

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