IGh:
Then I checked an old TWA FHB for their B727's, pagedate May 1977, Controls & Indicators, still shows the F40 position (withoutany mention of a Gate-Blocker for F40).
Maybe someone canfind an old Recurrent Train Bulletin describing DATE of the INITIALMODIFICATION that blocked B727's F40 [my guess is that modification was a FUELCONSERVATION measure after the price of fuel doubled between April and Augustof 1979 (????)].
Below is a none-too-good photo of the flap lock-out block. Note it is held in place with two screws. This photo is a clip from a photo of me and a good friend en route in a TWA 727-100 in the early 1970s, if memory serves me correctly. I believe itwas 1972.
Also, I am not sure the FHB would have ever shown the block. If the FHP you have is complete check the flight profile illustrations. They would show selection of Flaps 30 as final landing flaps.
