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Air carrier widebody transport altitude deviation undershot altitude crossing restriction flying SID from sfo.
| Attributes | |
| ACN | 160824 |
| Time | |
| Date | 199010 |
| Day | Thu |
| Local Time Of Day | 0601 To 1200 |
| Place | |
| Locale Reference | airport : sfo |
| State Reference | CA |
| Altitude | msl bound lower : 2500 msl bound upper : 3000 |
| Environment | |
| Flight Conditions | Mixed |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | common carrier : air carrier |
| Make Model Name | Widebody, Low Wing, 3 Turbojet Eng |
| Navigation In Use | Other |
| Flight Phase | climbout : intermediate altitude |
| Route In Use | departure sid : sid |
| Flight Plan | IFR |
| Person 1 | |
| Affiliation | company : air carrier |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : atp pilot : flight engineer |
| Experience | flight time last 90 days : 210 flight time total : 15000 flight time type : 3540 |
| ASRS Report | 160824 |
| Person 2 | |
| Affiliation | company : air carrier |
| Function | flight crew : first officer |
| Qualification | pilot : flight engineer pilot : atp |
| Experience | flight time last 90 days : 140 flight time total : 8000 flight time type : 1200 |
| ASRS Report | 160823 |
| Events | |
| Anomaly | altitude deviation : undershoot altitude deviation : crossing restriction not met non adherence : published procedure non adherence : clearance |
| Independent Detector | other flight crewa |
| Resolutory Action | none taken : detected after the fact |
| Consequence | Other |
| Supplementary | |
| Primary Problem | Flight Crew Human Performance |
| Air Traffic Incident | Pilot Deviation |
Narrative:
After takeoff from sfo runway 01R (440000# takeoff gross weight) using normal takeoff thrust (as opposed to reduced thrust), we missed the altitude restriction of 3000' at the sfo 6 DME by approximately 500'. We used our company's standard climb procedure. Both pilots reviewed the text of the SFO4.sfo SID (effective 10/90). The restriction is not mentioned in the text following takeoff runways 1L/right; it is only shown in the graphic. We both read the text but did not find the restriction on the familiar but recently revised graphic. This climb restriction should be mentioned in the text (as similar restrictions are at all other airports). This omission is potentially dangerous and should be corrected. Supplemental information from acn 160823: the plate is not explicit enough on this restriction, as the minimum climb gradient narrative does not predominately note the hard altitude restriction.
Original NASA ASRS Text
Title: ACR WDB ALT DEVIATION UNDERSHOT ALT CROSSING RESTRICTION FLYING SID FROM SFO.
Narrative: AFTER TKOF FROM SFO RWY 01R (440000# TKOF GROSS WT) USING NORMAL TKOF THRUST (AS OPPOSED TO REDUCED THRUST), WE MISSED THE ALT RESTRICTION OF 3000' AT THE SFO 6 DME BY APPROX 500'. WE USED OUR COMPANY'S STANDARD CLB PROC. BOTH PLTS REVIEWED THE TEXT OF THE SFO4.SFO SID (EFFECTIVE 10/90). THE RESTRICTION IS NOT MENTIONED IN THE TEXT FOLLOWING TKOF RWYS 1L/R; IT IS ONLY SHOWN IN THE GRAPHIC. WE BOTH READ THE TEXT BUT DID NOT FIND THE RESTRICTION ON THE FAMILIAR BUT RECENTLY REVISED GRAPHIC. THIS CLB RESTRICTION SHOULD BE MENTIONED IN THE TEXT (AS SIMILAR RESTRICTIONS ARE AT ALL OTHER ARPTS). THIS OMISSION IS POTENTIALLY DANGEROUS AND SHOULD BE CORRECTED. SUPPLEMENTAL INFO FROM ACN 160823: THE PLATE IS NOT EXPLICIT ENOUGH ON THIS RESTRICTION, AS THE MINIMUM CLB GRADIENT NARRATIVE DOES NOT PREDOMINATELY NOTE THE HARD ALT RESTRICTION.
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.