Indonesian National Transportation Safety Committee (NTSC) recommendations on Boeing-737's;

The following information has been gleaned from the Indonesian NTSC’s web site in which it has made recommendations to the FAA, Boeing and the European Aviation Safety Agency. There are potential serious safety implications for the world B737 fleet.

http://www.dephub.go.id/knkt/ntsc_home/ntsc.htm

The recommendation preamble text on the NTSC web site reads in part:

The National Transportation Safety Committee’s investigation into a failed main landing gear assembly on Boeing 737 aircraft, registration PK-GZN, Serial number 29209, that occurred at Syamsudin Noor Airport of Banjarmasin, South Kalimantan on 23 July 2008, found a crack in one of the brake mounting holes propagating inwards. The crack resulted in the fracturing of the inner cylinder and collapse of the axle. The landing gear assembly had been in service for 9 years 7 months and 8 days and 15,218 cycles.

The Boeing Company Overhaul Manual (32-11-11 page 301) states:

Examine the brake attachment flange on inner cylinder (62) for signs of cracks. If there are cracks, they will start from the brake mounting holes and could go inwards (toward axle) or outward (toward).

Fonte: NTSC Indonésia 12/08/2008.