The magnetic compass is the most primal and basic instruments used by the pilot. The compass correction card should be installed close to the compass and convenient for the pilot to read. A flight test checklist should be used that provides for recording the directly read deviations. When i built my pitts, the guy from the faa came out, looked at my paper work, made me put in a compass correction card and then said it was ok to try to fly it. Airpath compass repair kits deviation card aircraft. Complete compass correction card pdf 20202021 online with us legal forms. When printed, this word document makes a nice compass correction card for most compass card holders. Certificated airframe mechanics and certificated repair stations crs with the appropriate ratings are authorized to perform a compass swing, which includes adjustment of compass compensators. Images of blank compass correction card template unemeuf with. Pdf geomagnetic measurements for aeronautics researchgate. Compass deviation card, a card recording the aircraft magnetic deviation at no less than 30 degrees increment through 360 degrees.
This means in level flight your compass deviation error must not be greater. The compass correction card shows every 30 degrees of heading and a box underneath with a value filled in by the mechanic when they swung the compass. They are both similar in wording with the exception that a large aircraft cannot have more than 10 degrees variation. Tail draggers need to have the aft end of the fuselage propped up, preferably with wood, aluminum, or some other nonferrous material. Feb 20, 2007 i think the feds have a theory that airplanes wont fly without a compass correction card. The compass correction card is located next to the compass. In the past, faa inspectors seldom missed the opportunity to point out to the. Compass calibration card faa aircraft certification. While reliable in steady level flight it can give confusing indications when turning.
Awb 34008 issue 2 calibration of compasses civil aviation. More tvmdc practice problems correcting and uncorrecting the compass 48 more tvmdc practice problems and tvmdc help. Requestauthorization for dod civilian permanent duty or temporary change of station tcs travel. The compass calibration requirements for large aircraft more than 12,500 lbs maximum takeoff weight can be found in fars 25. So a compass with out a filled in card or a missing card is not really a complete installation. Swinging the compass experimental aircraft association. An58231 compass correction card univair aircraft corporation. Typically, you need a mechanic who can swing the compass and fill out the correction card. Apr 16, 2018 electromagnetic forces flowing through the aircraft s structure and nearby electrical systems and engines can also cause significant compass errors. Deviation is defined as deflection of the card needles to the right or left.
The compass rose on this airport ramp can be used to swing an aircraft magnetic compass the aircraft should be in level flight attitude for the compass swing procedure. Feb 22, 2011 id like to include compass correction templates on what would otherwise be a blank inside back cover. Residual deviation is recorded on the correction card and used to. Cut off the tab and stick the card to a convenient panel, local to the. Movement of the cyclic forward or aft causes the nose of the helicopter to pitch up or down. The international cessna 170 association view topic. Correcting a compass from true to compass and back. Feb 18, 2020 the wonderful images of blank compass correction card template unemeuf with compass deviation card template photograph below. So im looking for anyone who might have an original compass correction card that they could scan and send to me. That small liquid, or vertical card, compass most of us have in our cockpit can be. The pai700 compass i ordered came with a normal sized card, though the pai700 product description does not indicate a compass correction card comes with it. Tvmdc practice correcting and uncorrecting the compass. I decided to update my compass correction card by flying the 30s. Consult the manufacturers maintenance manual for all of these procedures.
Sign, fax and printable from pc, ipad, tablet or mobile with pdffiller. Aeronautics uses the magnetic compass extensively as a navigation tool. Apr 11, 2011 compass correction card and swinging the compass. I like an accurate compass card, just incase i ever urgently needed to fly by compass. The ns adjusting screw is the lh screw on the compensator. A compass base is a prepared area, with minimum magnetic abnormalities, on which an aircraft may be oriented or swung to various headings, for the purpose of checking the aircraft s onboard compass systems, including the standby compass. Once the compass has been corrected using small magnets fitted in the base and with soft iron balls any residual deviation is recorded as a table or graph. Airpath compass repair kits deviation card aircraft spruce.
You may want to repeat steps 14 to fine tune the correction. Reference should also be made to figure 318 for condensed information regarding the various compass errors and their correction. In some aircraft fine tuning adjustments and rechecks are necessary. In the world of federal aviation regulations the compass is called a magnetic direction indicator and the compass correction card is a placard. The compass swing is normally effected by placing the aircraft on various magnetic headings and comparing the deviations with those on the deviation cards refer to cfr 14 23. A csob lamination solution method is to place clear packaging tape on both sides and then cut the card out with scissors or xacto razor blade. In particular im looking for the longer narrow version found in the 53 and later aircraft. Starting with the aircraft on a known magnetic head ing of north, use the ns adjusting screw to remove all deviation so the compass indicates north. Depending upon the fitting location, either withdraw the lower housing as shown and clip the card into place. Errors include variation, or the difference between magnetic and true direction, and deviation, caused by the electrical wiring in the aircraft, which requires a compass correction card. Archibald smith in 1862 published admiralty manual for ascertaining and applying the deviations of the compass caused by the iron in a ship. Sirs navigation pegasus installation instructions pdf. Ac 43215 standardized procedures for performing aircraft.
Compass correction card template courtesy of beech lister ron g. Vertical card compass misreading modern mooney discussion. The compass correction card is a maintenance thing. The engine should be running with all electrical power activated. The compass shows the aircraft s heading relative to magnetic north. Make a note of the actual compass reading at each point, and complete the compass calibration card, which you should then mount near the compass for reference. Follow these simple steps to get compass correction card pdf prepared for submitting. Movement of the cyclic right or left causes the helicopter to tilt in that direction. Department of defense dod transportation agreement transfer of professional school personnel outside conus oconus 1111999. A magnetic compass with a deviation correction card attached, on which the. Nov, 2011 navigators piloting and charting reference card reference card with help for correcting and uncorrecting a compass, speed time formulas and other quick hints for navigators. On todays flight it was light and variable and i was in some empty airspace. Magnetic compass correction card ask a flight instructor.
For the life of me, i cannot see how someone could calibrate a compass from a compass rose. This other magnetic fields are produced from electrical currents from the aircraft avionics and varies on different headings. Without a card you wouldnt know how to correct or even if you had to correct. Correction card adjusting your compass before your compass can be adjusted the aircraft must be capable of being aligned to both the east west axis and northsouth axis. Compass correction card pdf 2020 fill and sign printable. In this guide a general description of a compass swing base calibration. Compass correction card pdf fill online, printable, fillable, blank. Update with your compass correction values, print, and laminate. Jun 09, 2015 i have a vertical card compass in my j. Permits consolidation of alss consumables by contractlot number. Heeling related content pdf handbook of magnetic compass adjustment. The process doesnt take too long, but you may need to chat with a few mechanics. The compass correction card a compass correction card is normally affixed to the instrument panel adjacent to the compass.
Fars 27 and 29 have the same requirements for small and large helicopters. To compensate for the magnetic errors produced by the electrical equipment in the aircraft a compass correction card is installed in the aircraft. Aircraft instrument systems maintenance aircraft systems. This checklist should be used to create the compass correction card and be included in the aircraft records. Presumably the displacement was caused when the compass was hit when removing the glare shield. Go through the recommendations to discover which details you will need to give. You are right in that you will need a completed compass correction card prior to your checkride. The compass correction card is located as shown in chapter 31. Finally, turn the aircraft to successive 30 degree headings and record the resultant readings on your compass correction deviation card. The process doesnt take too long, but you may need to chat with a few mechanics before you find one that can perform the necessary work. Computer, compass correction card, felsenthal magnetic compass adjustment marine compass deviation card template an58231 compass.
Because of the limited space available, the markings between the cardinal points should be multiplied by a factor of 10. Compass swing requirements faa aircraft certification. The use an another compass outside the aircraft, to determine the cardinal points is advised. For example if the compass reads 184 while the aircraft is positioned at 180 degrees, adjust the northsouth compensator until the compass indicates 182 degrees. Rotate the aircraft to a known magnetic heading of east, use the ew adjusting screw to. We did some recent panel work and the glare shield was removed. The sun and watch method worked better than the compass in my pitts. The compass correction card located on the compass tells the pilot which compass heading to steer to for a desired magnetic heading. Emergency locator transmitter continued lancair international inc. An inexpensive way to laminate is to apply clear packing tape to the front and back.
The movement of the aircraft about its longitudinal axis. A special magnetic correction system ensures accurate headings and silicone damping delivers consistent controlled direction. Requires the most current calibration compass correction card be retained in the manila envelope in the back of the logbook ensuring its availability for verification of transcribed information onto the verification compass correction cards. This card is 60% the size of a normal compass deviation card.
Its case is filled with silicone oil to dampen the movements. The correction card, supplied with the compass is designed to be either. To correct the deviation of a compass, the instrument can be calibrated by an aviation maintenance technician and a compass deviation card attached next to or beneath the compass to assist a. Compass correctiondeviation card pilots of america. Shipping hazardous materials hazmat products classified as hazardous materials hazmat cannot be shipped outside the contiguous united states lower 48 states. Mar 06, 2007 when printed, this word document makes a nice compass correction card for most compass card holders. Compass readings must read within 20 of deviation noted on dd form 16 pilot compass correction card. Aircraft compass calibration can be affected by the magnetisation of the aircraft and its.
Power plant inspection engine 1 remove the engine cowling and make a visual inspection of the entire engine section for evidence of fuel, oil and hydraulic leaks. Fully tso approved and available with an easa form 1 release certificate, the compass has been selected by many leading aircraft manufacturers including. The compass correction card should be installed near the compass, in a. Additionally, the compass is subject to dip errors. The movement of the aircraft about its lateral, or pitch, axis. Compass correction card pdf 20202021 fill and sign. After picking the plane up we noticed that the compass did not read correctly. When reading is within specified tolerance, compass does not need compensating. Find the document you will need in our collection of legal forms. Calibration of compass civil aviation authority of singapore.
962 536 925 1086 76 1085 18 1673 679 104 239 36 1370 266 561 1492 1319 1586 1258 969 1019 254 784 1578 1747