<< >> NASA ASRS Report 586984, July 2003

MD10 flight crew received TCASII RA when on descent from 2000 ft over hwd airport, when on approach to oak runway 29. Reporter unsure of crossing clearance restr.

Attributes
ACN	586984
Time
Date	200307
Day	Tue
Local Time Of Day	1801 To 2400
Place
Locale Reference	airport : oak.airport
State Reference	CA
Altitude	msl single value : 1800
Environment
Flight Conditions	VMC
Light	Night
Aircraft 1
Controlling Facilities	tracon : nct.tracon
Operator	common carrier : air carrier
Make Model Name	DC-10 Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	ils localizer & glide slope : 29 other
Flight Phase	descent : approach descent : intermediate altitude
Flight Plan	IFR
Aircraft 2
Operator	general aviation : personal
Make Model Name	Small Aircraft
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	None
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : flight engineer pilot : instrument pilot : multi engine pilot : atp pilot : commercial
ASRS Report	586984
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	conflict : airborne critical
Independent Detector	aircraft equipment : tcas
Resolutory Action	flight crew : took precautionary avoidance action
Supplementary
Problem Areas	Airspace Structure Airport Environmental Factor
Primary Problem	Airspace Structure
Situations
ATC Facility	procedure or policy : nct.tracon

Narrative:

After 'cleared for a visual approach, maintain 2000 ft until 6 mi from oak.' I was flying the airplane, and after passing 6 mi from runway, began descent out of 2000 ft to intercept ILS GS. TCASII RA occurred shortly after this due to traffic departing hayward airport. After experiencing the RA, I now believe that I was supposed to maintain 2000 ft until 6 DME from oak VOR. Due to phraseology used, I was unclr on this beforehand, and I'm still not sure which is correct. 2000 ft until 6 DME from oak VOR would be difficult to do, and still be stabilized for the approach at 1000 ft AGL, which is required by company operations manual.

Related reports:

• An MD11 crew received a late descent clearance from their cr...
• An MD11 received an unexpected cyyz STAR and began a descent...
• An MD83 flight crew received a descent clearance from lap TR...
• DC9 crew given descent clearance, received a TCASII climb RA...
• Unable to communication with center controller flight receiv...
• DC9 on STAR to dfw received descent clearance to cross a poi...

	Enter your search terms Submit search form
	Web www.37000feet.com

Original NASA ASRS Text

Title: MD10 FLT CREW RECEIVED TCASII RA WHEN ON DSCNT FROM 2000 FT OVER HWD ARPT, WHEN ON APCH TO OAK RWY 29. RPTR UNSURE OF XING CLRNC RESTR.

Narrative: AFTER 'CLRED FOR A VISUAL APCH, MAINTAIN 2000 FT UNTIL 6 MI FROM OAK.' I WAS FLYING THE AIRPLANE, AND AFTER PASSING 6 MI FROM RWY, BEGAN DSCNT OUT OF 2000 FT TO INTERCEPT ILS GS. TCASII RA OCCURRED SHORTLY AFTER THIS DUE TO TFC DEPARTING HAYWARD ARPT. AFTER EXPERIENCING THE RA, I NOW BELIEVE THAT I WAS SUPPOSED TO MAINTAIN 2000 FT UNTIL 6 DME FROM OAK VOR. DUE TO PHRASEOLOGY USED, I WAS UNCLR ON THIS BEFOREHAND, AND I'M STILL NOT SURE WHICH IS CORRECT. 2000 FT UNTIL 6 DME FROM OAK VOR WOULD BE DIFFICULT TO DO, AND STILL BE STABILIZED FOR THE APCH AT 1000 FT AGL, WHICH IS REQUIRED BY COMPANY OPS MANUAL.

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.