|Wow! Sounds like a very old belt. I thought all of them would have been caught in the 10 year seatbelt replacement requirement. Or is that only for commercial operators?
Not sure if this is the same self but it reminded me about this fatal accident.
http://www.tsb.gc.ca/eng/rapports-repor ... 109.asp#a3
The aircraft was fitted with Cessna model S2070H-16 front lap belt and shoulder harness assemblies. Although not considered a factor in the occurrence, two design discrepancies were identified that could have impeded rapid release of the harness assembly and hamper occupant escape from the aircraft. On this belt assembly it is possible to mistake the latch handle frame for the latch handle itself, and for occupants to insert their fingers under the frame and pull on the frame rather than the latch handle when attempting to release the buckle. This could confuse occupants in an emergency and delay the release of the buckle.
In addition, the lap belt length adjustment is on the latch side of the buckle and the short, fixed strap is on the tongue side of the buckle. The shoulder strap engages in a slot in the tongue and the short, fixed lap strap holds the shoulder strap in the diagonal position across the front of the occupant. Because the belt is mounted with the tongue of the latch on the opposite side of the occupant relative to the shoulder strap, releasing the lap belt loosens but does not release the shoulder strap. The occupant must then either disengage the shoulder strap separately from the lap belt or crawl out from under the shoulder strap to get out of the seat.
The design of the lap belt and shoulder harness assemblies was changed in 1975 with the introduction of the S2275 style assembly. On the new assembly the latch tongue and the shoulder strap are connected and oriented on the same side of the occupant, and releasing the latch releases the lap belt and the shoulder strap in one motion. As well the latch part of the buckle is attached to the lap belt in a manner that precludes occupants from placing their fingers under the latch handle when releasing the buckle. Between 21 July 2000 and 7 December 2000, the operator removed the old S2070H-16 style seat belt and shoulder harness assemblies from the other three Cessna 177B Cardinals in the fleet and installed the S2275 harness assemblies.