Narrative:

This concerns the ca sliding window emergency exit on a 757. On my first encounter I noticed a previous log book write up about the window. Other than checking that the window is properly closed and locked there is no requirement to check its actual operation. Because of the noted write up I checked its opening function. The lever which slides aft to allow opening was extremely difficult to pull back. As I know it is supposed to be a fingertip operation using one hand and minimal force. I encountered the same aircraft and problem probably 2 months later. Again no notes and dates. Same problem.sequence 1 in nov 2016. Encountered same problem. Mechanics spent 3 hours 'adjusting and lubricating' the window. Window was 'fixed' to being marginally acceptable. About to leave when a mechanic comes to the cockpit and gives me an FYI that he has researched the specs and the lever should require no more than 7 lbs of force to move! I try it and ask him 'how do you know how much force it is taking?' he says we have an instrument to measure it. Tell him to go and get it. Does the test and it fails miserably. Aircraft out of service. End of that story.sequence 2 in dec 2016. Have a 3 hour plus sit waiting for our aircraft. Get in and notice it is aircraft X. Check window and guess what? Just as bad as ever. After 3 hours of adjusting and [lubrication]; aircraft is out of service. At least now the plan is to bring in 3 mechanics and new parts. Later the next day; I arrive at the airport to fly. No passengers just 4 flight attendants and 3 mechanics. Check window. It is marginally acceptable. Fly to [destination] and park. Check window. It is now as bad as ever. Write it up. Go home. Notice this morning that it again was relubed and sent out. Don't know how the pilot taking it to [the next airport] could see 2 previous write ups and not check it? Maybe I'm the problem?failure of management oversight. Fix the aircraft. As far as I am concerned I will check the window every time I fly it. I thought about 'outing it' in an effort to make other captains aware of the problem. Unfortunately some of us don't really care even when 2 previous write ups are staring them in the face. I realize that the number of times this window has been needed for emergency egress is probably zero. Still it is my opinion that it is not performing as designed and certified. If I am wrong about this; just show me the errors of my thinking. Not a problem for me to admit that I am wrong.

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Original NASA ASRS Text

Title: B757 Captain reported that the Captain's side sliding window was extremely difficult to open.

Narrative: This concerns the CA sliding window emergency exit on a 757. On my first encounter I noticed a previous log book write up about the window. Other than checking that the window is properly closed and locked there is no requirement to check its actual operation. Because of the noted write up I checked its opening function. The lever which slides aft to allow opening was extremely difficult to pull back. As I know it is supposed to be a fingertip operation using one hand and minimal force. I encountered the same aircraft and problem probably 2 months later. Again no notes and dates. Same problem.Sequence 1 in Nov 2016. Encountered same problem. Mechanics spent 3 hours 'adjusting and lubricating' the window. Window was 'fixed' to being marginally acceptable. About to leave when a mechanic comes to the cockpit and gives me an FYI that he has researched the specs and the lever should require no more than 7 lbs of force to move! I try it and ask him 'how do you know how much force it is taking?' He says we have an instrument to measure it. Tell him to go and get it. Does the test and it fails miserably. Aircraft out of service. End of that story.Sequence 2 in Dec 2016. Have a 3 hour plus sit waiting for our aircraft. Get in and notice it is Aircraft X. Check window and guess what? Just as bad as ever. After 3 hours of adjusting and [lubrication]; aircraft is out of service. At least now the plan is to bring in 3 mechanics and new parts. Later the next day; I arrive at the airport to fly. No passengers just 4 flight attendants and 3 mechanics. Check window. It is marginally acceptable. Fly to [destination] and park. Check window. It is now as bad as ever. Write it up. Go home. Notice this morning that it again was relubed and sent out. Don't know how the pilot taking it to [the next airport] could see 2 previous write ups and not check it? Maybe I'm the problem?Failure of management oversight. Fix the aircraft. As far as I am concerned I will check the window every time I fly it. I thought about 'outing it' in an effort to make other captains aware of the problem. Unfortunately some of us don't really care even when 2 previous write ups are staring them in the face. I realize that the number of times this window has been needed for emergency egress is probably zero. Still it is my opinion that it is not performing as designed and certified. If I am wrong about this; just show me the errors of my thinking. Not a problem for me to admit that I am wrong.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.