# JASC 3416: Altimeter, Barometric/Encoder

- Type: JASC system/component code (FAA)
- ATA chapter: 34 Navigation
- Title in the code table: ALTIMETER, BAROMETRIC/ENCODER
- Service difficulty reports: 1,256
- FAA code table: https://www.faa.gov/sites/faa.gov/files/JASC_Code.pdf#page=37
- Page: https://openairdocs.org/jasc/3416

## What it covers

Altimeters and barometric encoders used to measure and indicate altitude. Also includes the unit which senses and alerts to a change in a preselected altitude. Does not include the Ground Proximity Systems and radio/radar altimeters which are filed in JASC codes 3444. Typical parts are dial, case, pointer, spring, etc.

## Service difficulty reports (1,256, newest 50)

- [SDR AALA202607095660](https://openairdocs.org/sdr/AALA202607095660), Jul 6, 2026: Airbus A319112. ALTIMETER. DEFECTIVE. AIRCRAFT WAS NOT GROUNDED: AN EMERGENCY WAS DECLARED INTO RSW DUE TO THE FLIGHT CREW REPORTING THAT AFTER TAKEOFF AND GE (N758US)
- [SDR UIEA2026062400539](https://openairdocs.org/sdr/UIEA2026062400539), Jun 25, 2026: Boeing 74745E. ALTIMETER. FAULTED. FOUND INDICATORY ASSY STBY ALTM FUNCTION FAIL IAW AMM 34-13-02-24-19 & AMM 34-13-02-424-020, REV 116. REPLACED STANDBY A (N473MC)
- [SDR AALA202606081704](https://openairdocs.org/sdr/AALA202606081704), Jun 6, 2026: Boeing 737823. ANTENNA. NO TEST. AIRCRAFT WAS GROUNDED: UPON DEPARTURE, AIRCRAFT LATERAL NAVIGATION WOULD NOT ENGAGE. LOST FLIGHT DIRECTORS AFTER ATTEMPT (N827NN)
- [SDR AALA202606085041](https://openairdocs.org/sdr/AALA202606085041), Jun 6, 2026: Boeing 737823. ANTENNA. NO TEST. AIRCRAFT WAS GROUNDED: UPON DEPARTURE, AIRCRAFT LATERAL NAVIGATION WOULD NOT ENGAGE. LOST FLIGHT DIRECTORS AFTER ATTEMPT (N827NN)
- [SDR AALA202606086816](https://openairdocs.org/sdr/AALA202606086816), Jun 6, 2026: Boeing 737823. ANTENNA. NO TEST. AIRCRAFT WAS GROUNDED: UPON DEPARTURE, AIRCRAFT LATERAL NAVIGATION WOULD NOT ENGAGE. LOST FLIGHT DIRECTORS AFTER ATTEMPT (N827NN)
- [SDR AALA202606080382](https://openairdocs.org/sdr/AALA202606080382), Jun 6, 2026: Boeing 737823. ANTENNA. NO TEST. AIRCRAFT WAS GROUNDED: UPON DEPARTURE, AIRCRAFT LATERAL NAVIGATION WOULD NOT ENGAGE. LOST FLIGHT DIRECTORS AFTER ATTEMPT (N827NN)
- [SDR FDEA202605240648](https://openairdocs.org/sdr/FDEA202605240648), May 24, 2026: Boeing 7673S2F. ALTIMETER. MALFUNCTIONED. AT FL380 JAKARTA ATC SAID WE WERE INDICATING FL367. WE WERE INDICATING FL380 CAPTAIN, FL380 F/O AND FL381 STDBY. NOTHING (N112FE)
- [SDR CNMA2026030002](https://openairdocs.org/sdr/CNMA2026030002), Mar 31, 2026: Boeing 76733A. ALTIMETER. INOPERATIVE. CA ALTIMETER INOP. FLAGGED OFF AT 25,000 FT. (N351AX)
- [SDR G1IA20260330107](https://openairdocs.org/sdr/G1IA20260330107), Mar 30, 2026: Pilats PC1245. ALTIMETER. FAILED. CLIMBING THROUGH 190 THE PILOT SIDE ALTIMETER FAILED, ON DECENT IT STARTED WORKING AGAIN UPON REACHING 17,000. DECLARED  (N5DM)
- [SDR ABXA20260330138](https://openairdocs.org/sdr/ABXA20260330138), Mar 30, 2026: Boeing 76731B. ALTIMETER. FAULTED. ON APPROACH, GEAR NOT DOWN EICAS AND BELL AT 2500 FEET FOLLOWED BY LAND 2 NO LAND 3 ON ASA. ACCOMPLISHED LAST FLIGHT FAU (N1361A)
- [SDR IPXA2026032684640](https://openairdocs.org/sdr/IPXA2026032684640), Mar 26, 2026: Boeing 75724APF. ALTIMETER. FAULTED. DURING DESCEND GEAR NOT DOWN CONFIG LIGHT ON AFTER EXTENDING FLAPS GEAR NOT DOWN WARNING SOUNDED RR LEFT RADIO ALTIMETER (N403UP)
- [SDR BJNA202603120002](https://openairdocs.org/sdr/BJNA202603120002), Mar 11, 2026: Boeing 7377H4. ALTIMETER. FAULTED. ON TAKE OFF AT UPWIND IAS DISAGREE QRH 10.17 QRH 10.1 CAPT IAS INDICATOR SHOWING SLOW ON CRUISE ALTIMETERS DISAGREE AP+F (N701VL)
- [SDR G1IA20260212105](https://openairdocs.org/sdr/G1IA20260212105), Feb 13, 2026: Pilats PC1245. ALTIMETER. INOPERATIVE. NR 1 ALTIMETER FAILED DURING DESCENT INTO GUP FROM FL230. (N5DM)
- [SDR DXTA2026010606414](https://openairdocs.org/sdr/DXTA2026010606414), Jan 2, 2026: Emb EMB505. ALTIMETER. OUT OF TOLERANCE. AT FL180 STANDBY ALTIMETER READS 90 FEET ABOVE TOLERANCE CORRECTIVE ACTION: PERFORMED A GVI OF STANDBY PITOT TUBE, NO DA (N429QS)
- [SDR QR9R2025051600002](https://openairdocs.org/sdr/QR9R2025051600002), May 16, 2025: Bolkms BK117C2. ALTIMETER. FAILED. ABORTED TAKEOFF FOR RADAR ALTIMETER DID NOT DISPLAY ON ND OR PFD DURING RUN-UP. REMOVED AND REPLACED RADAR ALTIMETER IAW
- [SDR DALA2025050803586](https://openairdocs.org/sdr/DALA2025050803586), May 7, 2025: Boeing 767332. INDICATOR. FAULTED. SHIP 0196 -DIV- FLIGHT DIVERTED TO JFK DUE TO F/O ELECTRIC ALTIMETER FLAG IN VIEW. CORRECTIVE ACTION: REPLACED INDICATOR (N196DN)
- [SDR QR9R2025040400001](https://openairdocs.org/sdr/QR9R2025040400001), Apr 4, 2025: Bolkms BK117C2. ALTIMETER. INACCURATE. STANDBY ALTIMETER MORE THAN 70 OFF FROM PRESSURE SETTING DURING START RUN-UP. REMOVED AND REPLACED ALTIMETER IAW AMM 34-
- [SDR QR9R2025031700003](https://openairdocs.org/sdr/QR9R2025031700003), Mar 17, 2025: Bolkms BK117C2. ALTIMETER. FAILED. RADAR ALTIMETER DISPLAY INTERMITTENT AT FIRST, THEN FAILED IN FLIGHT. REMOVED AND REPLACED RADAR ALTIMETER IAW HONEYWELL
- [SDR DALA2025021901231](https://openairdocs.org/sdr/DALA2025021901231), Feb 16, 2025: Boeing 767332. ALTIMETER. FAULTED. SHIP 1200 -RVSM- ALT DISAGREE CAUTION CLIMBING THROUGH FL260. AT FL360 CAPTAIN 36250, FO 36000, STBY 36700. CAPTAIN AIRS (N1200K)
- [SDR FDEA202502140228](https://openairdocs.org/sdr/FDEA202502140228), Feb 14, 2025: Airbus A300B4605R. ALTIMETER. FAILED. DURING THE CLIMB, FOS ALTIMETER WAS ERRATIC, FLUCTUATING ABOUT 500FT. PERFORMED PITOT STATIC TEST AND PUMPED UP AIRSPEED (N732FD)
- [SDR QR9R2025021000002](https://openairdocs.org/sdr/QR9R2025021000002), Feb 10, 2025: Bolkms BK117C2. ALTIMETER. INOPERATIVE. RADAR ALTIMETER INOP DURING START RUN-UP. REMOVED AND REPLACED IAW RADAR ALTIMETER INSTALLATION MANUAL 006-10536-0010. M
- [SDR CALA2025010201747](https://openairdocs.org/sdr/CALA2025010201747), Dec 30, 2024: Boeing 767322. INDICATOR. FAILED. CAPTAIN ALTIMETER FAILED ON TAKEOFF BETWEEN 4000 AND 5000 FEET. FIM TASK 34-12 FAULT TREE 805 FOLLOWED. CAPT SIDE ALTIME (N661UA)
- [SDR QR9R2024121900001](https://openairdocs.org/sdr/QR9R2024121900001), Dec 19, 2024: Bolkms BK117C2. ALTIMETER. FAILED. RADAR ALTIMETER FAILED DURING TAKEOFF. REMOVED AND REPLACED RADAR ALTIMETER IAW COMM NAV 34-41-01 REV A. MOC OK.
- [SDR IPXA2024121981955](https://openairdocs.org/sdr/IPXA2024121981955), Dec 18, 2024: Boeing 75724APF. ALTIMETER. INOPERATIVE. AT CRUISE ALTITUDE 290 EICAS MSG IAS DISAGREE FOUND FO AIRSPEED 10KTS DIFFERENT THAN CAPTS AND ALT AND FO ALTIMETER OFF  (N436UP)
- [SDR QR9R2024111300003](https://openairdocs.org/sdr/QR9R2024111300003), Nov 13, 2024: Bolkms BK117C2. ALTIMETER. INOPERATIVE. ABORTED TAKEOFF IN HOVER TAXI FOR RADAR ALTIMETER INOP. REMOVED AND REPLACED RADAR ALTIMETER IAW NAVCOM 34-41-01; MOC SU
- [SDR QR9R2024100800004](https://openairdocs.org/sdr/QR9R2024100800004), Oct 8, 2024: Bolkms BK117C2. ALTIMETER. INOPERATIVE. RADAR ALT INOP, NO INDICATIONS DURING RUN-UP. REMOVED AND REPLACED RADAR ALTIMETER; MOC OK IAW CMM 34-41-01.
- [SDR QR9R2024091900005](https://openairdocs.org/sdr/QR9R2024091900005), Sep 19, 2024: Bolkms BK117C2. ALTIMETER. FAULTY. RADAR ALTIMETER FAILED ON RUN-UP. AVIONICS GOT IT WORKING ON BATTERY POWER ONLY, BUT AFTER ENGINE START WITH AVO MASTERS
- [SDR AALA202408214699](https://openairdocs.org/sdr/AALA202408214699), Aug 20, 2024: Boeing 737823. ALTIMETER. FAULTED. AIRCRAFT WAS GROPUNDED: DURING APPROACH AT FLAPS 5 AT 210 KNOTS, ALL THREE GEAR RED UNSAFE LIGHTS, SPEED BRAKES EXTENDED (N851NN)
- [SDR FDEA202407211039](https://openairdocs.org/sdr/FDEA202407211039), Jul 21, 2024: Airbus A300F4605R. ALTIMETER. FAILED. AT CRUISE RECEIVED CAPT ALTI FAULT ECAM WITH COMMENSURATE INDICATIONS ON THE PRIMARY ALTIMETER INCLUDING OFF FLAG FOLLOW (N654FE)
- [SDR FDEA202405130656](https://openairdocs.org/sdr/FDEA202405130656), May 13, 2024: Boeing 7673S2F. ALTIMETER. FAULTED. IN CRUISE AT ALTITUDE FL340, WITH RIGHT AUTOPILOT ENGAGED. FO ALTIMETER DROPPED ABOUT 330 FT. WITH EICAS ALT DISAGREE, A (N286FE)
- [SDR FDEA202404230535](https://openairdocs.org/sdr/FDEA202404230535), Apr 23, 2024: Airbus A300F4605R. ADC. FAILED. AT FL350, .78 MACH, ABOUT 1 HOUR INTO FLIGHT, FO SPEED TAPE BEGAN ROLLING BACK FOLLOWED BY IAS DISCREPANCY ECAM ALERT. F (N651FE)
- [SDR UIEA2024020500070](https://openairdocs.org/sdr/UIEA2024020500070), Feb 5, 2024: Boeing 767306. ALTIMETER. MALFUNCTIONED. CAPT ALTIMETER MOMENTARILY WENT A FEW THOUSAND FEET LOW THEN RAPIDLY RECOVERED PASSING FL 340 IN CLIMB AND DESCENT. VSI  (N1229A)
- [SDR IPXA2024012521784](https://openairdocs.org/sdr/IPXA2024012521784), Jan 25, 2024: Boeing 76734AF. ALTIMETER. WARNING MESSAGE. ABOVE 2 HRS INTO FLT AT 38K WE HAD AN ALT DISAGREE CAUGHTION MSG. WE DETERMINED THE F.O.'S WAS INCORRECT. IT WAS ABOUT 2 (N313UP)
- [SDR QMLA122820121](https://openairdocs.org/sdr/QMLA122820121), Dec 23, 2023: Pilats PC1245. ALTIMETER. UNKNOWN. RIGHT AFTER TAKEOFF PILOT ALTIMETER FAILED. ATC CONFIRMD NO ALTITUDE READOUT.WE RETURNED TO RAP UNEVENTFULLY AND WROTE U (N970NA)
- [SDR CALA2023121403643](https://openairdocs.org/sdr/CALA2023121403643), Dec 11, 2023: Boeing 767424ER. INDICATOR. STICKING. STANDBY ALTIMETER SHOWING 5000 FT LOW DECSENDING THROUGH FL200. PLEASE CHECK FOR WATER IN DRAIN PORTS R2, R6, R7, R9, AN (N76055)
- [SDR DALA2023120109880](https://openairdocs.org/sdr/DALA2023120109880), Nov 27, 2023: Boeing 767432ER. UNKNOWN. UNKNOWN. SHIP 1814 -RVSM- ALT DISAGREE AT FL330 RIGHT ALTIMETER 250 FEET HIGHER THAN LEFT AND CENTER ,RAN QRH AND SELECTED CO-PIL (N838MH)
- [SDR DALA2023111309346](https://openairdocs.org/sdr/DALA2023111309346), Nov 9, 2023: Boeing 757231. UNKNOWN. UNKNOWN. SHIP 6811 - RVSM - ENROUTE FO ALTIMETER WOULD MOVE UP AND DOWN 500 FEET OFF FLAG WOULD THEN COME ON, HAPPENED EVERY 30 M (N705TW)
- [SDR IPXA2023110235370](https://openairdocs.org/sdr/IPXA2023110235370), Oct 30, 2023: Boeing 76734AF. ALTIMETER. INOPERATIVE. *SUPPLEMENTAL RVSM* F/O AND CAPT. ALTIMETERS DIFFERED BY 270FT @FL 330. STANDBY MATCHED CPT ALTIMETER. F/O SELECTED AIR  (N313UP)
- [SDR IPXA2023103012409](https://openairdocs.org/sdr/IPXA2023103012409), Oct 28, 2023: Boeing 76734AF. ALTIMETER. FAULTED. PASSING THOUGH 12,000 FT RECEIVED ALT DISAGREE HSG, ALTIMETERS WHERE OFF BY 400 FT , RIGHT SIDE APPEARED TO BE INCORRECT (N313UP)
- [SDR DXTA2023091895680](https://openairdocs.org/sdr/DXTA2023091895680), Sep 17, 2023: Cessna 680A. UNKNOWN. FAULTED. STANDBY ATTITUDE INDICATOR: AFTER TAKEOFF NOTICED STBY ATTITUDE INDICATOR WAS IN A 3 DEGREE RIGHT TURN. WAS CONSISTANTLY (N667QS)
- [SDR UIEA2024031500152](https://openairdocs.org/sdr/UIEA2024031500152), Sep 15, 2023: Boeing 76731B. ALTIMETER. FAILED. CAPT ALTIMETER FAILED AND DISPLAYED OFF FLAG AT CRUISE. ACCOMPLISED QRH. NO CHANGE(<P>CAPTAIN ALTIMETER REMOVED AND REPL (N1361A)
- [SDR YV3R2023071000576](https://openairdocs.org/sdr/YV3R2023071000576), Jun 23, 2023: Robsin R44RAVENII. ALTIMETER. DEFECTIVE. CUSTOMER REPORTED ALTIMETER P/N: A613-2 WAS STICKING AND SLUGGISH IN OPERATION.
- [SDR DALA2023050203416](https://openairdocs.org/sdr/DALA2023050203416), Apr 30, 2023: Boeing 767332. UNKNOWN. UNKNOWN. SHIP 196 -RVSM- ALT DISAGREE EICAS ATL MCC, CORRECTIVE ACTION: DUE TO FIM PROCEDURE BY MCC REPLACED L ADC IAW AMM 34-12- (N196DN)
- [SDR DALA2023031702002](https://openairdocs.org/sdr/DALA2023031702002), Mar 14, 2023: Boeing 767332. UNKNOWN. UNKNOWN. SHIP 188 -RVSM- ALT DISAGREE EICAS MESSAGE AT FL360 ALTIMETERS FLUCUATING BETWEEN 120' AND 250' OFF. CORRECTIVE ACTION:  (N188DN)
- [SDR IXXA2023040202](https://openairdocs.org/sdr/IXXA2023040202), Feb 13, 2023: Boeing 767319. SKIN PANEL. GOUGED. SCRATCHES/GOUGE MARKS ON RH ALT STATIC PORT. (N367AZ)
- [SDR 2023F00035](https://openairdocs.org/sdr/2023F00035), Jan 25, 2023: Beech B200. ALTIMETER. FAULTED. APPROXIMATELY 45 MINUTES AFTER DEPARTING KBIL WHILE IN CRUISE FLIGHT, THE CREW OBSERVED THE PILOTS ALTIMETER CLIMBING RA (N912SV)
- [SDR A6WA2023012318438](https://openairdocs.org/sdr/A6WA2023012318438), Jan 21, 2023: Cndair CL6002B19. INDICATOR. INOPERATIVE. ABORTED TAKE-OFF AT APPROX. 100 KNOTS DUE TO STANDBY ASI NOT COMING ALIVE. STANDBY ASI REMAINED AT ZERO. BRACKET TEMPS S (N454AW)
- [SDR 2023FA0000014](https://openairdocs.org/sdr/2023FA0000014), Jan 5, 2023: Snias AS350B3. ALTIMETER. MISOVERHAULED. RECEIVED ENCODING ALTIMETER, AFTER OVERHAUL UNDER WO# 3267658. DURING THE FUNCTIONAL CHECKS, THE ITEM FAILED TO SEND THE (N755AM)
- [SDR FDEA202212303037](https://openairdocs.org/sdr/FDEA202212303037), Dec 30, 2022: Doug MD11F. INDICATOR. UNRELIABLE. AIRSPEED UNRELIABLE PASSING 12000 FEET. CHECKLIST DETERMINED BAD INFORMATION ON FIRST OFFICER SIDE. SELECTED CADC 1 ON F (N573FE)
- [SDR ABXA20230103160](https://openairdocs.org/sdr/ABXA20230103160), Dec 29, 2022: Boeing 767338. CONTROL UNIT. FAULTED. BOTH ALTIMETERS ALTERNATED BETWEEN ALT AND NORMAL . AIRCRAFT DIVERTED INTO DEN. AIRCRAFT WAS GROUNDED BY MAINTENANCE. MA

All 1,256: https://openairdocs.org/jasc/3416/reports.md

## Other codes in chapter 34

- [JASC 3400](https://openairdocs.org/jasc/3400): Navigation System (692 reports)
- [JASC 3410](https://openairdocs.org/jasc/3410): Flight Environment Data (218 reports)
- [JASC 3411](https://openairdocs.org/jasc/3411): Pitot/Static System (1,586 reports)
- [JASC 3412](https://openairdocs.org/jasc/3412): Outside Air Temperature Indicator/Sensor (254 reports)
- [JASC 3413](https://openairdocs.org/jasc/3413): Rate of Climb Indicator (157 reports)
- [JASC 3414](https://openairdocs.org/jasc/3414): Airspeed/Mach Indicator (860 reports)
- [JASC 3415](https://openairdocs.org/jasc/3415): High Speed Warning (39 reports)
- [JASC 3417](https://openairdocs.org/jasc/3417): Air Data Computer (1,210 reports)
- [JASC 3418](https://openairdocs.org/jasc/3418): Stall Warning System (1,641 reports)
- [JASC 3420](https://openairdocs.org/jasc/3420): Attitude and Direction Data System (772 reports)
- [JASC 3421](https://openairdocs.org/jasc/3421): Attitude Gyro and Indicating System (1,142 reports)
- [JASC 3422](https://openairdocs.org/jasc/3422): Directional Gyro and Indicating System (649 reports)
- [JASC 3423](https://openairdocs.org/jasc/3423): Magnetic Compass (101 reports)
- [JASC 3424](https://openairdocs.org/jasc/3424): Turn and Bank/Rate of Turn Indicator (153 reports)
- [JASC 3425](https://openairdocs.org/jasc/3425): Integrated Flight System (1,148 reports)
- [JASC 3430](https://openairdocs.org/jasc/3430): Landing and Taxi Aids (56 reports)
- [JASC 3431](https://openairdocs.org/jasc/3431): Localizer/VOR System (129 reports)
- [JASC 3432](https://openairdocs.org/jasc/3432): Glide Slope System (66 reports)
- [JASC 3433](https://openairdocs.org/jasc/3433): Microwave Landing System (26 reports)
- [JASC 3434](https://openairdocs.org/jasc/3434): Marker Beacon System (27 reports)
- [JASC 3435](https://openairdocs.org/jasc/3435): Heads Up Display System (10 reports)
- [JASC 3436](https://openairdocs.org/jasc/3436): Wind Shear Detection System (70 reports)
- [JASC 3440](https://openairdocs.org/jasc/3440): Independent Position Determining System (261 reports)
- [JASC 3441](https://openairdocs.org/jasc/3441): Inertial Guidance System (289 reports)
- [JASC 3442](https://openairdocs.org/jasc/3442): Weather Radar System (3,442 reports)
- [JASC 3443](https://openairdocs.org/jasc/3443): Doppler System (110 reports)
- [JASC 3444](https://openairdocs.org/jasc/3444): Ground Proximity System (552 reports)
- [JASC 3445](https://openairdocs.org/jasc/3445): Air Collision Avoidance System (214 reports)
- [JASC 3446](https://openairdocs.org/jasc/3446): Non Radar Weather System (23 reports)
- [JASC 3450](https://openairdocs.org/jasc/3450): Dependent Position Determining System (106 reports)
- [JASC 3451](https://openairdocs.org/jasc/3451): DME/TACAN System (197 reports)
- [JASC 3452](https://openairdocs.org/jasc/3452): ATC Transponder System (624 reports)
- [JASC 3453](https://openairdocs.org/jasc/3453): Long-Range Navigation (LORAN) System (175 reports)
- [JASC 3454](https://openairdocs.org/jasc/3454): Visual Omnirange (VOR) System (317 reports)
- [JASC 3455](https://openairdocs.org/jasc/3455): Automatic Direction Finder (ADF) System (164 reports)
- [JASC 3456](https://openairdocs.org/jasc/3456): Omega Navigation System (9 reports)
- [JASC 3457](https://openairdocs.org/jasc/3457): Global Positioning System (635 reports)
- [JASC 3460](https://openairdocs.org/jasc/3460): Flight Management Computing Hardware System (4,690 reports)
- [JASC 3461](https://openairdocs.org/jasc/3461): Flight Management Computing Software System (68 reports)
- [JASC 3497](https://openairdocs.org/jasc/3497): Navigation System Wiring (269 reports)

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