B757-200 crew did not stay within the radial confines as stipulated by the SID.

Attributes
ACN	519220
Time
Date	200107
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : mroc.airport
State Reference	FO
Altitude	msl bound lower : 6000 msl bound upper : 7000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tower : iad.tower
Operator	common carrier : air carrier
Make Model Name	B737-100
Flight Phase	climbout : initial climbout : intermediate altitude
Route In Use	departure sid : ramon
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : multi engine pilot : commercial pilot : instrument pilot : atp
Experience	flight time last 90 days : 100 flight time total : 8850 flight time type : 200
ASRS Report	519220
Events
Anomaly	non adherence : far non adherence : company policies non adherence : clearance other anomaly other other spatial deviation
Resolutory Action	none taken : anomaly accepted
Supplementary
Problem Areas	Aircraft Airspace Structure Company Flight Crew Human Performance
Primary Problem	Company
Air Traffic Incident	Pilot Deviation

Narrative:

Air carrier X flight abc from sjo to iah, jul/sun/01. Departing runway 7 on the ramon departure, we exceeded (went south of) the tio 113 degree radial. Air carrier's special departure procedures for runway 7 dictate that flap retraction not begin until 4021 ft MSL. The ramon departure for runway 7 requires that the aircraft stay north of the tio 113 degree radial. In the B757 if normal flap retraction procedures are initiated at 4021 ft MSL (allowing the aircraft to accelerate to flaps up speed) it is impossible to remain north of the tio 113 degree radial. If at 4021 ft MSL the flaps are retracted to 5 degrees and the aircraft accelerated to flaps 5 degrees speed, it is just possible to remain north of the tio 113 degree radial. Air carrier's special departure procedures need to be modified to provide better guidance to B757 crews, to ensure that they stay north of the tio 113 degree radial.

Original NASA ASRS Text

Title: B757-200 CREW DID NOT STAY WITHIN THE RADIAL CONFINES AS STIPULATED BY THE SID.

Narrative: ACR X FLT ABC FROM SJO TO IAH, JUL/SUN/01. DEPARTING RWY 7 ON THE RAMON DEP, WE EXCEEDED (WENT S OF) THE TIO 113 DEG RADIAL. ACR'S SPECIAL DEP PROCS FOR RWY 7 DICTATE THAT FLAP RETRACTION NOT BEGIN UNTIL 4021 FT MSL. THE RAMON DEP FOR RWY 7 REQUIRES THAT THE ACFT STAY N OF THE TIO 113 DEG RADIAL. IN THE B757 IF NORMAL FLAP RETRACTION PROCS ARE INITIATED AT 4021 FT MSL (ALLOWING THE ACFT TO ACCELERATE TO FLAPS UP SPD) IT IS IMPOSSIBLE TO REMAIN N OF THE TIO 113 DEG RADIAL. IF AT 4021 FT MSL THE FLAPS ARE RETRACTED TO 5 DEGS AND THE ACFT ACCELERATED TO FLAPS 5 DEGS SPD, IT IS JUST POSSIBLE TO REMAIN N OF THE TIO 113 DEG RADIAL. ACR'S SPECIAL DEP PROCS NEED TO BE MODIFIED TO PROVIDE BETTER GUIDANCE TO B757 CREWS, TO ENSURE THAT THEY STAY N OF THE TIO 113 DEG RADIAL.

Data retrieved from NASA's ASRS site as of July 2007 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.