User talk:NilesDeNeuker

Inspect the vertical beam webs before 10000 flights or before 1500 flights from 27 April 1995, whichever is the later. Reinspect at intervals not exceeding 1500 flights (Option 1) or intervals not exceeding 3000 flights (Option 2).

Bron: http://www.casa.gov.au/airworth/airwd/ADfiles/over/b747/B747-136.pdf