MIL-T-5421B (NOTICE 1), MILITARY SPECIFICATION: TUBES, PITOT, ELECTRICALLY HEATED, AIRCRAFT (05 MAY 1999) [S/S BY MIL-DTL-5421D]

MIL-T-5421B (NOTICE 1), MILITARY SPECIFICATION: TUBES, PITOT, ELECTRICALLY HEATED, AIRCRAFT (05 MAY 1999) [S/S BY MIL-DTL-5421D]., MIL-T-5421B is inactive for new design and is no longer used, except for replacement purposes.