B777 flight crew reported being dispatched with a MEL restricting airspeed to 270 knots or mach .82....

Attributes
ACN	1283146
Time
Date	201507
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Aircraft 1
Make Model Name	B777 Undifferentiated or Other Model
Flight Phase	Other Preflight Planning
Flight Plan	IFR
Person 1
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 175 Flight Crew Total 18410 Flight Crew Type 3124
Person 2
Function	Pilot Not Flying First Officer
Qualification	Flight Crew Air Transport Pilot (ATP)
Experience	Flight Crew Last 90 Days 228 Flight Crew Total 11786 Flight Crew Type 4761
Events
Anomaly	Aircraft Equipment Problem Less Severe Deviation - Procedural MEL Deviation - Procedural Published Material / Policy Deviation - Speed All Types

Narrative:

Our flight was dispatched with MEL 32060 (main gear uplock spring missing). Though flight can be flown with gear up; MEL restricts it to max gear extend speed of 270/.82. Feeling the flight plan needed to better account for this restriction the captain was on the phone with dispatch for quite some time going over scenarios and safety issues associated with this limitation. While this was going on we agreed that the first officer and I would head to the airplane to run preflight and setup checks. 10;000 lbs of fuel was added at captains request per our situation in regards to the MEL issue. Halfway into the flight the other international relief officer and myself entered the cockpit; at the completion of our rest period; and shortly after we began discussing the speed restriction as it pertains to anything that we might have overlooked. We then sent a message to dispatch about our concern that if we had to divert from a critical point to an alternate the planned divert speed would be limited to 270 and had that been accounted for? Apparently it was not and we were told this info would be passed on to the sabre people. We asked for a follow up response if it were possible for them. Though we didn't hear back before conclusion of flight. The fom does say sabre takes into account MEL and performance adjustments for weight and speed; though it didn't in our case. We could have used better vvm earlier on in digging deeper into being sure we accounted for all the issues the MEL would affect.

Original NASA ASRS Text

Title: B777 flight crew reported being dispatched with a MEL restricting airspeed to 270 knots or Mach .82. They felt that the computer flight plan did not reflect these limitations in its calculations.

Narrative: Our flight was dispatched with MEL 32060 (main gear uplock spring missing). Though flight can be flown with gear up; MEL restricts it to max gear extend speed of 270/.82. Feeling the flight plan needed to better account for this restriction the Captain was on the phone with dispatch for quite some time going over scenarios and safety issues associated with this limitation. While this was going on we agreed that the FO and I would head to the airplane to run preflight and setup checks. 10;000 lbs of fuel was added at Captains request per our situation in regards to the MEL issue. Halfway into the flight the other IRO and myself entered the cockpit; at the completion of our rest period; and shortly after we began discussing the speed restriction as it pertains to anything that we might have overlooked. We then sent a message to dispatch about our concern that if we had to divert from a critical point to an alternate the planned divert speed would be limited to 270 and had that been accounted for? Apparently it was not and we were told this info would be passed on to the Sabre people. We asked for a follow up response if it were possible for them. Though we didn't hear back before conclusion of flight. The FOM does say Sabre takes into account MEL and performance adjustments for weight and speed; though it didn't in our case. We could have used better VVM earlier on in digging deeper into being sure we accounted for all the issues the MEL would affect.

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.

B777 flight crew reported being dispatched with a MEL restricting airspeed to 270 knots or mach .82. They felt that the computer flight plan did not reflect these limitations in its calculations.