British Airways 5390
Printed page 7. PDF page 14.
contributes to holding it in place, but is fitted from the outside of the aircraft and is secured by means of 90 countersunk bolts, also fitted from the outside. The large number of bolts are required to prevent leakage ofOpen official document at PDF page 14Aircraft Accident Report 1/92: BAC One-Eleven G-BJRT, 10 June 1990