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PA44 student and instructor allege intermittent equipment malfunction, advised by pct on established communication of incorrect transponder code penetrating the dc ADIZ.
| Attributes | |
| ACN | 602516 |
| Time | |
| Date | 200312 |
| Day | Mon |
| Local Time Of Day | 1201 To 1800 |
| Place | |
| Locale Reference | navaid : aml.vortac |
| State Reference | VA |
| Altitude | msl single value : 2000 |
| Environment | |
| Flight Conditions | VMC |
| Light | Dusk |
| Aircraft 1 | |
| Controlling Facilities | tracon : pct.tracon tower : dtw.tower |
| Operator | general aviation : instructional |
| Make Model Name | PA-44 Seminole Turbo Seminole |
| Operating Under FAR Part | Part 91 |
| Navigation In Use | other |
| Flight Phase | descent : approach |
| Route In Use | arrival : vfr |
| Flight Plan | DVR |
| Person 1 | |
| Affiliation | other |
| Function | instruction : trainee |
| Qualification | pilot : multi engine pilot : cfi pilot : atp |
| Experience | flight time last 90 days : 46 flight time total : 4460 flight time type : 68 |
| ASRS Report | 602516 |
| Person 2 | |
| Affiliation | other |
| Function | instruction : instructor |
| Events | |
| Anomaly | aircraft equipment problem : less severe airspace violation : entry non adherence : published procedure |
| Independent Detector | atc equipment other atc equipment : radar other controllera |
| Resolutory Action | controller : issued alert other |
| Consequence | faa : reviewed incident with flight crew faa : investigated other |
| Supplementary | |
| Problem Areas | Flight Crew Human Performance Aircraft |
| Primary Problem | Aircraft |
| Air Traffic Incident | Pilot Deviation |
Narrative:
Aircraft entered ADIZ with transponder displaying 1200 after transponder was set to XXXX by PIC/PNF as advised by potomac approach on 125.05. Suspected problem: electronic display/transponder malfunction in cockpit. CFI (PF) receiving instruction for initial multi-engine rating from CFI/PIC (PNF). Filed 2 ADIZ VFR plans with leesburg FSS to depart ADIZ jyo (leesburg, va) direct to okv (winchester, va) and return. Departed jyo. Contacted potomac departure, direct okv. Exited ADIZ, squawked 1200. Airwork performed as prebriefed. Gear extended several times during lesson. Upon retraction, gear exhibited in transit light and low voltage bus warning light flashed on/off several times. PIC (a&P) troubleshot, unable to duplicate in-flight. Departed okv vicinity for return jyo. Approximately XA00, outside ADIZ, 300 degree radial aml, 25 DME, made 1 360 degree turn to remain clear of ADIZ and contacted ATC on 125.05. Received code XXXX and PIC entered code with readback to ATC. PIC (PNF) and student (also CFI) visually verified XXXX mode C displayed on transponder. Aircraft entered ADIZ at XA05. Approximately 5 mins later, ATC requested our position and heading. PIC (PNF) advised location and heading. ATC requested squawk identify, PIC complied. ATC advised transponder transmitting code 1200 and advised 'squawk XXXX quickly.' PIC verbally confirmed transponder set to XXXX and recycled as precaution. No further comment from ATC received. PIC advised jyo in sight. ATC approved frequency change to CTAF. Upon return to flight school, we were advised to call ATC. PIC informed of ATC complaint, brief discussion of transponder malfunction ensued. Wrote up transponder discrepancy per 91.213, placarded inoperative, grounded for maintenance. Wrote up low bus voltage warning light per 91.213, troubleshot, nff, check at 100 hour. Next day, potomac approach quality assurance advised ATC tapes showed aircraft entered ADIZ at XA09, displaying code 1200, despite cockpit display of XXXX.
Original NASA ASRS Text
Title: PA44 STUDENT AND INSTRUCTOR ALLEGE INTERMITTENT EQUIP MALFUNCTION, ADVISED BY PCT ON ESTABLISHED COM OF INCORRECT XPONDER CODE PENETRATING THE DC ADIZ.
Narrative: ACFT ENTERED ADIZ WITH XPONDER DISPLAYING 1200 AFTER XPONDER WAS SET TO XXXX BY PIC/PNF AS ADVISED BY POTOMAC APCH ON 125.05. SUSPECTED PROB: ELECTRONIC DISPLAY/XPONDER MALFUNCTION IN COCKPIT. CFI (PF) RECEIVING INSTRUCTION FOR INITIAL MULTI-ENG RATING FROM CFI/PIC (PNF). FILED 2 ADIZ VFR PLANS WITH LEESBURG FSS TO DEPART ADIZ JYO (LEESBURG, VA) DIRECT TO OKV (WINCHESTER, VA) AND RETURN. DEPARTED JYO. CONTACTED POTOMAC DEP, DIRECT OKV. EXITED ADIZ, SQUAWKED 1200. AIRWORK PERFORMED AS PREBRIEFED. GEAR EXTENDED SEVERAL TIMES DURING LESSON. UPON RETRACTION, GEAR EXHIBITED IN TRANSIT LIGHT AND LOW VOLTAGE BUS WARNING LIGHT FLASHED ON/OFF SEVERAL TIMES. PIC (A&P) TROUBLESHOT, UNABLE TO DUPLICATE INFLT. DEPARTED OKV VICINITY FOR RETURN JYO. APPROX XA00, OUTSIDE ADIZ, 300 DEG RADIAL AML, 25 DME, MADE 1 360 DEG TURN TO REMAIN CLR OF ADIZ AND CONTACTED ATC ON 125.05. RECEIVED CODE XXXX AND PIC ENTERED CODE WITH READBACK TO ATC. PIC (PNF) AND STUDENT (ALSO CFI) VISUALLY VERIFIED XXXX MODE C DISPLAYED ON XPONDER. ACFT ENTERED ADIZ AT XA05. APPROX 5 MINS LATER, ATC REQUESTED OUR POS AND HDG. PIC (PNF) ADVISED LOCATION AND HDG. ATC REQUESTED SQUAWK IDENT, PIC COMPLIED. ATC ADVISED XPONDER XMITTING CODE 1200 AND ADVISED 'SQUAWK XXXX QUICKLY.' PIC VERBALLY CONFIRMED XPONDER SET TO XXXX AND RECYCLED AS PRECAUTION. NO FURTHER COMMENT FROM ATC RECEIVED. PIC ADVISED JYO IN SIGHT. ATC APPROVED FREQ CHANGE TO CTAF. UPON RETURN TO FLT SCHOOL, WE WERE ADVISED TO CALL ATC. PIC INFORMED OF ATC COMPLAINT, BRIEF DISCUSSION OF XPONDER MALFUNCTION ENSUED. WROTE UP XPONDER DISCREPANCY PER 91.213, PLACARDED INOP, GNDED FOR MAINT. WROTE UP LOW BUS VOLTAGE WARNING LIGHT PER 91.213, TROUBLESHOT, NFF, CHK AT 100 HR. NEXT DAY, POTOMAC APCH QUALITY ASSURANCE ADVISED ATC TAPES SHOWED ACFT ENTERED ADIZ AT XA09, DISPLAYING CODE 1200, DESPITE COCKPIT DISPLAY OF XXXX.
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.