Narrative:

[We] departed vhhh on runway 7R on the lakes RNAV departure. After porpa; ATC issued a clearance to climb to 9;000 ft. With the understanding that ATC meant for us to climb to the issued altitude at that time; I began the climb to that altitude as is indicated by procedures written in the our flight operations manual and the aim which state that altitude clearances assigned without re-stating any previous restrictions including SID restrictions cancels those restrictions. The first officer suggested that ATC meant to climb to that altitude within the restrictions and limitations of the SID procedure; which would have held us down to 5;000 until the next fix. We were higher than the SID restrictions at that point so we requested confirmation of clearance to 9;000 ft was intended to be now. Radio traffic did not permit a timely response to that inquiry. The core problem is that company procedures concerning SID altitude clearances are unclear at best. Several countries operate differently from ICAO where controller issued clearances of altitude assignments do not negate previous restrictions. These differences should not exist as it leads to misunderstandings and improper assumptions where pilots may operate in several countries in the same day. This complex set of procedures needs to be corrected and standardized.

Google
 

Original NASA ASRS Text

Title: Air Carrier departing Hong Kong described a confused ATC SID altitude assignment; noting contradicting directions found in several documents regarding SID altitude requirements.

Narrative: [We] departed VHHH on Runway 7R on the Lakes RNAV departure. After PORPA; ATC issued a clearance to climb to 9;000 FT. With the understanding that ATC meant for us to climb to the issued altitude at that time; I began the climb to that altitude as is indicated by procedures written in the our flight operations manual and the AIM which state that altitude clearances assigned without re-stating any previous restrictions including SID restrictions cancels those restrictions. The First Officer suggested that ATC meant to climb to that altitude within the restrictions and limitations of the SID procedure; which would have held us down to 5;000 until the next fix. We were higher than the SID restrictions at that point so we requested confirmation of clearance to 9;000 FT was intended to be now. Radio traffic did not permit a timely response to that inquiry. The core problem is that Company procedures concerning SID altitude clearances are unclear at best. Several countries operate differently from ICAO where controller issued clearances of altitude assignments do not negate previous restrictions. These differences should not exist as it leads to misunderstandings and improper assumptions where pilots may operate in several countries in the same day. This complex set of procedures needs to be corrected and standardized.

Data retrieved from NASA's ASRS site as of April 2012 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.