Payload Bay Door Fit Check

If the payload bay doors have been removed before the flight during normal turnaround or OMM/OMDP, a special PLBD Fit Check is performed during door opening instead of the regular procedure. The main difference is that the Fit Check is done in Manual mode, and consists of opening the starboard door for 15 seconds, closing it and using a modified Centerline Latch Extended Guide Roller diagram to check for good closure (the roller must be between points A and B, not just below point D; if the roller is between C and D, that will result in a launch day deorbit), and then opening it all the way. This is then repeated for the port door (minus the centerline latch check). Compare this to the nominal Centerline Latch Extended Guide Roller test.

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created March - May 2000 / last updated August 2005