Randy Johnstone

NPRM Number: FAA-2009-0783 Date: September 8, 2009 Agree with comments Propose: Different text Proposed Text/Comment: Boeing has reports of cracked frames on MD-80s; none has been reported (yet) on MD-90s. 1. SUMMARY Revise the third sentence to read, "This proposed AD results from reports of cracked overwing frames on McDonnell-Douglas Model MD-80 series airplanes, and frames of the same design are installed on Model MD-90-30 airplanes." This change will be in line with the first paragraph of section "Discussion" of the NPRM. Otherwise, the SUMMARY says that MD-90 overwing frames have cracked, which is not the case. 2. Discussion Revise the first sentence in the second paragraph to read, "The cracked overwing frames on McDonnell-Douglas Model MD-90-30 airplanes have the same design as those installed on Model MD-80 series airplanes." This is subjective but I think it sounds more logical. The issue is the MD-90 frames cracking, not the MD-80 frames (which are already addressed). 3. Unsafe Condition Revise the first sentence to read, "This AD results from reports of overwing frames of the same design cracking on McDonnell-Douglas Model MD-80 series airplanes" (or something to this effect). Reasons(s) for Proposed Text/Comments: (use additional sheets if necessary) See above Name: Bob Takara Group: Service Engineering / Structures and Payloads