AD NO.
2023-03-15
SUBJECT
Air Transport Association (ATA) of America Code: 21, Air conditioning.
APPLICABILITY
This AD applies to The Boeing Company Model 747-100, 747-100B, 747-100B SUD, 747-200B, 747- 200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SR, and 747SP series airplanes, certificated in any category, as identified in Boeing Alert Requirements Bulletin 747-21A2577 RB, Revision 2, dated February 10, 2023.
ISSUED BY
FAA