B777 Undifferentiated or Other Model
Flight Crew Last 90 Days 200; Flight Crew Total 25000; Flight Crew Type 4000
Communication Breakdown
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Published Material / Policy
General None Reported / Taken
Aircraft; Company Policy; MEL; Human Factors
This aircraft has a long history of Left Engine Bleed Trips after takeoff. Despite this history; the Left Engine Pressure Sensor that is clearly causing all these in-flight Bleed trips; is still deferred and not fixed.  Why? And more significantly; why is this Left Sensor deferral NOT on the Pilot Dispatch flight plan. It is hidden in the paperwork so well; that had I not known the airplane had this history from a previous flight three weeks ago; I would have never had found it.  Is our goal to surprise crews at takeoff with such EICAS Cautions and issues ?  Is the goal here to have someone hide this rather extensive history from the crew and Dispatcher ?  The resulting Left Engine Bleed trips that have occurred to me and many other pilots on this item; require operational planning and consideration; as well as prior review of their associated check list (Bleed Off Engine Left)  Maintenance Control also told us that if the Bleed trips; (as it has in many prior flights on this aircraft) that we were authorized to reset the Bleed in flight. This is counter to the checklist.  The Fleet Technical advised against this reset. This leaves us with an Aircraft that is being only pressurized by one engine bleed on a 10-hour flight. Not a good situation on a long term basis. Airworthiness.
Captain reports about a B777 aircraft with a chronic history of Left Engine Bleed Trips after takeoff. He questions why the Left Engine Pressure Sensor that is causing all the in-flight Bleed trips remains deferred and not fixed? Also; why was the Left Sensor deferral NOT on the Pilot's Dispatch flight plan; instead of being hidden deep in the paperwork?