Overshot altitude crossing restriction at bvl of 29000 ft followed by an unrelated TCASII at 21000 f...

Attributes
ACN	235191
Time
Date	199303
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : bvl
State Reference	UT
Altitude	msl bound lower : 25000 msl bound upper : 29000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zlc
Operator	common carrier : air carrier
Make Model Name	Medium Large Transport, Low Wing, 2 Turbojet Eng
Flight Phase	descent other
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 56 flight time total : 14000
ASRS Report	235191
Person 2
Affiliation	company : air carrier
Function	flight crew : second officer
Qualification	pilot : atp
Experience	flight time last 90 days : 200 flight time total : 4000 flight time type : 1000
ASRS Report	234946
Events
Anomaly	altitude deviation : excursion from assigned altitude altitude deviation : crossing restriction not met non adherence : clearance
Independent Detector	other controllera other flight crewa
Resolutory Action	flight crew : returned to intended course or assigned course
Consequence	Other
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

We were given clearance to cross bvl at or above FL290 then descend to FL210. I made a mental calculation that we should start down and did so. There was a check pilot giving me a line check and we were discussing something or other and I noticed we were at FL250 and had not passed bvl. Busted clearance big time! I disconnected autoplt and started climb and told copilot to call ATC and tell them. They replied no problem, just continue descent to FL210. We did so and just at level off got an RA, 'descend, descend.' I immediately complied. After descending 300-400 ft the RA changed to 'climb, climb.' the check pilot saw the commuter plane who was no factor. The controller saw us descend and we told him we had an RA. When we got to FL210 again the RA changed to 'monitor vertical speed.' I did exactly what the TCASII said to do and it gave conflicting instructions. I no longer trust it. We need tcasiii now. The TCASII incident seemed independent of the altitude bust but may have been contributed to by it. I do not think there was any loss of legal separation.

Original NASA ASRS Text

Title: OVERSHOT ALT XING RESTRICTION AT BVL OF 29000 FT FOLLOWED BY AN UNRELATED TCASII AT 21000 FT.

Narrative: WE WERE GIVEN CLRNC TO CROSS BVL AT OR ABOVE FL290 THEN DSND TO FL210. I MADE A MENTAL CALCULATION THAT WE SHOULD START DOWN AND DID SO. THERE WAS A CHK PLT GIVING ME A LINE CHK AND WE WERE DISCUSSING SOMETHING OR OTHER AND I NOTICED WE WERE AT FL250 AND HAD NOT PASSED BVL. BUSTED CLRNC BIG TIME! I DISCONNECTED AUTOPLT AND STARTED CLB AND TOLD COPLT TO CALL ATC AND TELL THEM. THEY REPLIED NO PROB, JUST CONTINUE DSCNT TO FL210. WE DID SO AND JUST AT LEVEL OFF GOT AN RA, 'DSND, DSND.' I IMMEDIATELY COMPLIED. AFTER DSNDING 300-400 FT THE RA CHANGED TO 'CLB, CLB.' THE CHK PLT SAW THE COMMUTER PLANE WHO WAS NO FACTOR. THE CTLR SAW US DSND AND WE TOLD HIM WE HAD AN RA. WHEN WE GOT TO FL210 AGAIN THE RA CHANGED TO 'MONITOR VERT SPD.' I DID EXACTLY WHAT THE TCASII SAID TO DO AND IT GAVE CONFLICTING INSTRUCTIONS. I NO LONGER TRUST IT. WE NEED TCASIII NOW. THE TCASII INCIDENT SEEMED INDEPENDENT OF THE ALT BUST BUT MAY HAVE BEEN CONTRIBUTED TO BY IT. I DO NOT THINK THERE WAS ANY LOSS OF LEGAL SEPARATION.

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.

Overshot altitude crossing restriction at bvl of 29000 ft followed by an unrelated TCASII at 21000 ft.