Narrative:

We deported NAS miramar on the julian 9 departure which required us to climb at a higher performance than our normal cruise climb schedule. Passing 3000 ft. I contacted san diego departure control to report passing 3000 ft to 11000 ft. He responded 'climb and maintain 7000 ft. I replied, passing 4000 ft for 7000 ft. Then relayed it to crew. The controller then came back and said, 'turn left 310 and maintain 5000 ft. I acknowledged that and relayed it to the crew. But due to the inherent ambient noise of a P3C flight station, the added noise of flying through rain and the higher than normal engine noise required to do the julian 9 departure. My voice was somewhat washed out and not heard by the crew. These events coupled by the fact that the PF the airplane's communications selector had malfunctioned and became inoperative, prevented the crew from hearing the 7000 ft and 5000 ft altitude amendments by the controller. While passing through approximately 5700 ft ATC called for us to verify our altitude. I told him we were 5700 ft and going down to 5000 ft. There apparently was another airplane at 6000 ft. I don't know how near a miss this incident was but by the high tone inflection of the controller's voice it was obviously too close. Upon return to NAS willow grove, PA, I called the san diego departure control supervisor and we basically discussed what I have written in this report.

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Original NASA ASRS Text

Title: PLTS OF MIL FLC DID NOT FOLLOW ATC AMENDED INSTRUCTIONS TO TURN AND LEVEL OFF FROM CLB CAUSING AN NMAC.

Narrative: WE DEPORTED NAS MIRAMAR ON THE JULIAN 9 DEP WHICH REQUIRED US TO CLB AT A HIGHER PERFORMANCE THAN OUR NORMAL CRUISE CLB SCHEDULE. PASSING 3000 FT. I CONTACTED SAN DIEGO DEP CTL TO RPT PASSING 3000 FT TO 11000 FT. HE RESPONDED 'CLB AND MAINTAIN 7000 FT. I REPLIED, PASSING 4000 FT FOR 7000 FT. THEN RELAYED IT TO CREW. THE CTLR THEN CAME BACK AND SAID, 'TURN L 310 AND MAINTAIN 5000 FT. I ACKNOWLEDGED THAT AND RELAYED IT TO THE CREW. BUT DUE TO THE INHERENT AMBIENT NOISE OF A P3C FLT STATION, THE ADDED NOISE OF FLYING THROUGH RAIN AND THE HIGHER THAN NORMAL ENG NOISE REQUIRED TO DO THE JULIAN 9 DEP. MY VOICE WAS SOMEWHAT WASHED OUT AND NOT HEARD BY THE CREW. THESE EVENTS COUPLED BY THE FACT THAT THE PF THE AIRPLANE'S COMS SELECTOR HAD MALFUNCTIONED AND BECAME INOP, PREVENTED THE CREW FROM HEARING THE 7000 FT AND 5000 FT ALT AMENDMENTS BY THE CTLR. WHILE PASSING THROUGH APPROX 5700 FT ATC CALLED FOR US TO VERIFY OUR ALT. I TOLD HIM WE WERE 5700 FT AND GOING DOWN TO 5000 FT. THERE APPARENTLY WAS ANOTHER AIRPLANE AT 6000 FT. I DON'T KNOW HOW NEAR A MISS THIS INCIDENT WAS BUT BY THE HIGH TONE INFLECTION OF THE CTLR'S VOICE IT WAS OBVIOUSLY TOO CLOSE. UPON RETURN TO NAS WILLOW GROVE, PA, I CALLED THE SAN DIEGO DEP CTL SUPVR AND WE BASICALLY DISCUSSED WHAT I HAVE WRITTEN IN THIS RPT.

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.