Narrative:

We departed sbgr on runway 9L at 682;000 lbs flaps 1 with a 3 knot headwind. Filed and assigned the BGC2A RNAV departure. SID requires a left turn after 4000 feet; but the terrain is 4718 feet with an obstacle on the mountain top just 5 NM north; along the route of flight. The SID requires a climb of 5% at 1250 fpm at 250 knots. This climb gradient is not possible with a flap retraction at this weight. Also minimum maneuver speed was 248 knots. We had to keep flaps 1 and minimum maneuver flaps 1 to ensure terrain clearance with both engines at full climb thrust. We climbed at flaps 1 at minimum maneuver speed until 1000 feet above the obstacle at 4718 ft. Had any problem occurred during this critical phase or had any other crew retracted the flaps and/or accelerated; the terrain clearance would be impossible. This SID is not a good idea without some weight adjustments or note to keep flaps 1 until above 5700 feet etc; an engine failure would have been critical and required an immediate turn to the south. I suggest a note and/or weight limit be added to this SID to avoid a serious problem. Normal climb procedures with both engines at climb thrust is not sufficient to avoid the terrain 5 miles north. Heavy weight and quick turn north not recommended to fly this SID. Put a note in briefing pages to keep flaps 1 and climb first above 5000 feet.

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Original NASA ASRS Text

Title: B777 Captain reported that the BGC2A RNAV departure from SGBR may not provide sufficient terrain clearance if the aircraft is heavy and the turn is initiated at 4000 feet.

Narrative: We departed SBGR on Runway 9L at 682;000 lbs Flaps 1 with a 3 knot headwind. Filed and assigned the BGC2A RNAV departure. SID requires a left turn after 4000 feet; but the terrain is 4718 feet with an obstacle on the mountain top just 5 NM north; along the route of flight. The SID requires a climb of 5% at 1250 fpm at 250 knots. This climb gradient is not possible with a flap retraction at this weight. Also minimum maneuver speed was 248 knots. We HAD to keep Flaps 1 and Minimum Maneuver flaps 1 to ensure terrain clearance with BOTH engines at full climb thrust. We climbed at Flaps 1 at minimum maneuver speed until 1000 feet above the obstacle at 4718 ft. Had ANY problem occurred during this critical phase or had ANY other crew retracted the flaps and/or accelerated; the terrain clearance would be impossible. This SID IS NOT a good idea without some weight adjustments or note to keep flaps 1 until above 5700 feet etc; an engine failure would have been critical and required an IMMEDIATE turn to the south. I suggest a note and/or weight limit be added to this SID to avoid a serious problem. Normal climb procedures with BOTH engines at climb thrust is NOT sufficient to avoid the terrain 5 miles north. Heavy weight and quick turn north not recommended to fly this SID. Put a note in briefing pages to keep flaps 1 and climb first above 5000 feet.

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.