W. G IIB M.M. 34.02-00 Performed OAT system - Inspection Check / Bulb resistance vs Temperature Chart . and temp bulb fails. Placed OAT Temp bulb P/N-NIS280384 S/N-I2329 on order and reinstalled OAT Temp Bulb hack in act, and strermered part in act,, awaiting parts delivery ETA early Am. All work performed I