Learjet 60: Errors in Maintenance Manual Procedures
March 2010
There are a few errors in the Learjet 60 Maintenance Manual in the procedures of complying with the Functional Test of the Cabin Pressure Warning System on Learjet 60 models 60-002 thru 60-096, modified per SB 60-21-12 & 60-097 & Sub.
Correct Procedures
Verified as correct through Learjet Tech Pubs on SQ1109-047-60
- Page 211, 1. D. (3) (b) should read: "Connect a second pitot-static test set vacuum source to the cabin sense port (labeled Pc) on the CPC and the cabin sense port (labeled Pc) on the integrated cabin pressure indicator."
- Page 211, between 1. D. (3) (d) and (e), should tell you to pull the Squat Switch C/B.
- Page 212, (4)(a) and (5)(a) should be swapped.
- (4)(a) should read: "Disconnect the second pitot-static test set static source from the atmosphere sense port of the integrated cabin pressure indicator. Keep the pitot-static test set connected to the cabin sense port of the integrated cabin pressure indicator."
- (5)(a) should read: "Disconnect the pitot-static test set vacuum source from the cabin sense port of the integrated cabin pressure indicator and connect to the atmospheric sense port of the integrated cabin pressure indicator."
- Page 213, (6)(d) should read: "Connect the No. 2 pitot-static tester vacuum source to the cabin sense port of the cabin pressure indicator."
- Page 214 (7)(f) should read: "Disconnect the No. 2 pitot-static tester from the cabin sense port fitting in the cabin pressure controller and the cabin port of the cabin pressure indicator."
