What was found
ATW - WHEN SWITCHING AIR FROM APU TO ENG AIR, NR 1 PACK GIVES A STRONG OIL BURNING SMELL FOR A FEW MINUTES THEN IT CLEARS. OPS CHECKED NR 1 PACK ON THE GROUND WITH APU AND ENG AIR, NO SMELL NOTICED.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
ATW - WHEN SWITCHING AIR FROM APU TO ENG AIR, NR 1 PACK GIVES A STRONG OIL BURNING SMELL FOR A FEW MINUTES THEN IT CLEARS. OPS CHECKED NR 1 PACK ON THE GROUND WITH APU AND ENG AIR, NO SMELL NOTICED.