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IFR small aircraft cleared to maintain at or above 1600' by bay TRACON has close encounter with national guard aircraft departing moffett field.
| Attributes | |
| ACN | 133689 |
| Time | |
| Date | 199001 |
| Day | Wed |
| Local Time Of Day | 0001 To 0600 |
| Place | |
| Locale Reference | atc facility : nuq airport : pao |
| State Reference | CA |
| Altitude | msl bound lower : 1600 msl bound upper : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Controlling Facilities | tracon : oak |
| Operator | general aviation : personal |
| Make Model Name | Small Aircraft |
| Flight Phase | cruise other descent other |
| Flight Plan | IFR |
| Aircraft 2 | |
| Operator | other |
| Make Model Name | Any Unknown or Unlisted Aircraft Manufacturer |
| Flight Phase | climbout : initial climbout : intermediate altitude |
| Person 1 | |
| Affiliation | Other |
| Function | flight crew : single pilot |
| Qualification | pilot : private pilot : instrument |
| Experience | flight time last 90 days : 50 flight time total : 290 flight time type : 160 |
| ASRS Report | 133689 |
| Person 2 | |
| Affiliation | government : military |
| Function | flight crew : captain oversight : pic |
| Qualification | pilot : military |
| Events | |
| Anomaly | altitude deviation : overshoot other anomaly other other anomaly other other anomaly other |
| Independent Detector | other controllera other flight crewa |
| Resolutory Action | none taken : anomaly accepted |
| Consequence | faa : reviewed incident with flight crew |
| Miss Distance | horizontal : 700 |
| Supplementary | |
| Primary Problem | ATC Human Performance |
| Air Traffic Incident | Inter Facility Coordination Failure Operational Deviation |
| Situations | |
| ATC Facility | procedure or policy : unspecified |
Narrative:
I was on an IFR flight plan and was in contact with ATC throughout the entire flight from san luis obispo to palo alto. I was in contact with bay approach continuously until I was told to contact palo alto tower. I was never in contact (or was told to contact) moffett tower. Southwest of moffett, bay cleared me to 2000'. When I was abeam moffett, bay said 'maintain at or above 1600' until in contact with palo alto tower.' I asked bay if she wanted me to switch over to tower now and she said yes. I started a descent and leveled off at 1700'. An air national guard aircraft took off from moffett and passed not less than 700' to my left. My passenger and I had him in sight at all times, we were well clear and at no time did we have to take evasive action. After landing at palo alto, I was asked to call moffett tower. According to moffett tower, the clearance which they had worked out with bay approach was only to 2000'.
Original NASA ASRS Text
Title: IFR SMA CLEARED TO MAINTAIN AT OR ABOVE 1600' BY BAY TRACON HAS CLOSE ENCOUNTER WITH NATIONAL GUARD ACFT DEPARTING MOFFETT FIELD.
Narrative: I WAS ON AN IFR FLT PLAN AND WAS IN CONTACT WITH ATC THROUGHOUT THE ENTIRE FLT FROM SAN LUIS OBISPO TO PALO ALTO. I WAS IN CONTACT WITH BAY APCH CONTINUOUSLY UNTIL I WAS TOLD TO CONTACT PALO ALTO TWR. I WAS NEVER IN CONTACT (OR WAS TOLD TO CONTACT) MOFFETT TWR. SW OF MOFFETT, BAY CLRED ME TO 2000'. WHEN I WAS ABEAM MOFFETT, BAY SAID 'MAINTAIN AT OR ABOVE 1600' UNTIL IN CONTACT WITH PALO ALTO TWR.' I ASKED BAY IF SHE WANTED ME TO SWITCH OVER TO TWR NOW AND SHE SAID YES. I STARTED A DSCNT AND LEVELED OFF AT 1700'. AN AIR NATIONAL GUARD ACFT TOOK OFF FROM MOFFETT AND PASSED NOT LESS THAN 700' TO MY LEFT. MY PAX AND I HAD HIM IN SIGHT AT ALL TIMES, WE WERE WELL CLEAR AND AT NO TIME DID WE HAVE TO TAKE EVASIVE ACTION. AFTER LNDG AT PALO ALTO, I WAS ASKED TO CALL MOFFETT TWR. ACCORDING TO MOFFETT TWR, THE CLRNC WHICH THEY HAD WORKED OUT WITH BAY APCH WAS ONLY TO 2000'.
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.