LR45 with ZAB experienced radio interference, received TCASII RA and did not reach assigned altitude...

Attributes
ACN	622156
Time
Date	200406
Day	Sun
Local Time Of Day	1201 To 1800
Place
Locale Reference	atc facility : zab.artcc
State Reference	NM
Altitude	msl bound lower : 28000 msl bound upper : 31000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zab.artcc
Operator	general aviation : corporate
Make Model Name	Learjet 45
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Aircraft 2
Controlling Facilities	artcc : zab.artcc
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Plan	IFR
Person 1
Affiliation	company : corporate
Function	flight crew : captain oversight : pic
Qualification	pilot : cfi pilot : atp
Experience	flight time last 90 days : 35 flight time total : 5000 flight time type : 400
ASRS Report	622156
Person 2
Affiliation	company : corporate
Function	flight crew : first officer
Events
Anomaly	altitude deviation : excursion from assigned altitude conflict : airborne critical non adherence : clearance other anomaly other
Independent Detector	aircraft equipment : tcas other flight crewa
Resolutory Action	flight crew : took evasive action
Consequence	faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Ambiguous

Narrative:

First clearance was to FL310.; we requested right turn deviation for WX avoidance. ATC communication was broken up by unauthorized ground-to-ground communication on center frequency 128.20 MHZ. We did not receive a call to stop our climb at FL280. TCASII gave an RA, we complied. Descended to FL280. People on ground spoke spanish and blocked out ATC from our altitude of 1500 ft to FL280. Center frequency of 128.20 MHZ was subsequently closed. We called ATC, explained why we were not at FL280. They informed me that no further action would be taken. On a previous flight, same people on ground were interfering. Wish law enforcement could find them and torch those radios.

Original NASA ASRS Text

Title: LR45 WITH ZAB EXPERIENCED RADIO INTERFERENCE, RECEIVED TCASII RA AND DID NOT REACH ASSIGNED ALT.

Narrative: FIRST CLRNC WAS TO FL310.; WE REQUESTED R TURN DEV FOR WX AVOIDANCE. ATC COM WAS BROKEN UP BY UNAUTH GND-TO-GND COM ON CTR FREQ 128.20 MHZ. WE DID NOT RECEIVE A CALL TO STOP OUR CLB AT FL280. TCASII GAVE AN RA, WE COMPLIED. DSNDED TO FL280. PEOPLE ON GND SPOKE SPANISH AND BLOCKED OUT ATC FROM OUR ALT OF 1500 FT TO FL280. CTR FREQ OF 128.20 MHZ WAS SUBSEQUENTLY CLOSED. WE CALLED ATC, EXPLAINED WHY WE WERE NOT AT FL280. THEY INFORMED ME THAT NO FURTHER ACTION WOULD BE TAKEN. ON A PREVIOUS FLT, SAME PEOPLE ON GND WERE INTERFERING. WISH LAW ENFORCEMENT COULD FIND THEM AND TORCH THOSE RADIOS.

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.