ARMY MODEL UH-1, EH-1 HELICOPTER

1 TM 55-1520-242-MTFMAINTENANCE TEST FLIGHT MANUAL army MODELUH-1, EH-1 HELICOPTERTM 55-1520-242-mtf is published for the use of allconcerned.*This manual supersedes TM 55- 1500 -219-MTF, 28 February 1979, including all changes. HEADQUARTERS DEPARTMENT OF THE army 20 December 1985TM 55-1520-242-MTFA maintenance test flight is an exception-ally demanding operation and requires athorough flight readiness inspection (pre-flight). The flight readiness inspection isprescribed in TM 55-1520-210-10 and TM55-1520-220-10 Operator s Manual andmust be completed prior to the main-tenance test flight.

2 Emergency proceduresare found in the applicable -10 or checklistand are not duplicated in this to each maintenance test flight, thepilot will contact maintenance/quality con-trol personnel to determine the main-tenance that has been performed. Thismanual should be used only by qualifiedmaintenance test flight pilots as requiredin AR copilot or observer is required for the checks listedbelow:(1)(2)(3)Hydraulic system check (pg. 2-15)Power cylinder check (pg. 2-34)Hydraulics off check (pg. 2-41)C-3 a/(b blank)TM 55-1520-242-MTFC5 CHANGE HEADQUARTERSDEPARTMENT OF THE ARMYNO. 5 WASHINGTON, , 18 July 2005 Maintenance TestFlight ManualArmy ModelUH-1, EH-1 HELICOPTERTM 55-1520-242-MTF, 20 December 1985 is changedas follows:1.

3 Remove and insert pages as indicated below. New or changed text material is indicated by a verticalbar in the margin. An illustration change is indicated bya miniature pointing Pages Insert pagesi and ii i and ii1-1 and 1-2 1-1 and 1-22-1 and 2-2 2-1 and 2-22-9 and 2-10 2-9 and 2-102-13 and 2-14 2-13 and 2-142. Retain this sheet in front of manual for referencepurposes.}2-15 and 2-16 2-15 and 2-162-29 and 2-30 2-29 and 2-302-39 and 2-40 2-39 and 2-40 TM 55-1520-242-MTF By Order of the Secretary of the army : Official: PETER J.

4 SCHOOMAKER General, United States army Chief of Staff Administrative Assistant to the Secretary of the army DISTRIBUTION: To be distributed in accordance with DA Form 12-31-E, block no. 0800, requirements for TM 55-1520-242-MTF. SANDRA R. RILEY0516005C5TM 55-1520-242-MTFC3 CHANGEHEADQUARTERSDEPARTMENT OF THE ARMYNO. 3 WASHINGTON, , 15 November 1991 Maintenance TestFlight ManualArmy ModelUH-1, EH-1 HELICOPTERTM 55-1520-242-MTF, 20 December 1985, ischanged as and insert pages as indica-ted or changed text material isindicated by a vertical bar in the illustration change is indicated by aminiature pointing pagesa/b2-1 and 2-22-33 and 2-342-43 through 2-463-71 and 3-724-1 and 4-24-11 and thismanual for referenceInsert pagesa/b2-1 and 2-22-33 and 2-342-43 through 2-463-71 and 3-724-1 and 4-24-11 and 4-12sheet in front 55-1520-242-MTFC3By Order of the Secretary of the army :GORDON R.

5 SULLIVANG eneral, United States ArmyOfficial:Chief of StaffMILTON H. HAMILTONA dministrative Assistant to theSecretary of the Army00213 DISTRIBUTION:To be distributed in accordance withDA Form 12-31-E, block no. 0800, MTFmaintenance requirements forTM 55-1520-242-MTFTABLE OF CONTENTSREPORTING ERRORS AND RECOMMENDINGIMPROVEMENTSYou can help improve this manual. If you find anymistakes or if you know of a way to improve these pro-cedures, please let us know. Mail your letter, DAForm 2028 (Recommended Changes to Publicationsand Blank Forms) located in the back of the applica-,directly to: Commander, army Aviation andand Missile Command, ATTN: AMSAM-MMC-MA-NP,Redstone Arsenal, AL 35898-5000.

6 A reply will befurnish to you. You may also provide DA Form2028 information to AMCOM via e-mail, fax, orthe World Wide Web. Our fax number is DSN 788-6546 or Commercial 256-842-6546. Our e-mail addressSECTION

7 PAGEI Introduction .. 1-1 IIMaintenance Test Flight Checklist .. 2-1 Prior to Maintenance Test Flight .. 2-1 Before Starting Engine .. 2-2 Starting Engine .. 2-9 Engine Runup .. 2-15 Before Takeoff .. 2-29 Hover Checks .. 2-30 Takeoff and Climb .. 2-37 Level Off Checks .. 2-38In-Flight Checks .. 2-39 Before Landing Checks.. 2-47 After Landing and Engine ShutdownChecks .. 2-48C5 iis: Instructions for sendingan electronic 2028 may be found at the back of theOperator's Manual immediately preceding thehard copy 2028.

8 For the World Wide Web use: Operator's Manual (when using the 2028 fromthe Operator's Manual, make sure the publicationnumber and title are changed to reflect this MTF),TM 55-1520-242-MTFTABLE OF CONTENTS (CONT)SECTIONPAGEIIIT roubleshooting .. 3-1 Troubleshooting Guide A -Starting .. 3-2 Troubleshooting Guide B -Instruments .. 3-7 Troubleshooting Guide C -Electrical .. 3-16 Troubleshooting Guide D -Caution Panel .. 3-38 Troubleshooting Guide E -PowerPlant .. 3-48 Troubleshooting Guide F -Power Train .. 3-57 Troubleshooting Guide G -Hydraulic .. 3-60 Troubleshooting Guide H -Flight Controls .. 3-63 Troubleshooting Guide I -Nonapplicable.

9 3-74 Troubleshooting Guide J -Vibrations .. 3-75 Troubleshooting Guide K -Communications/NavigationEquipment .. 3-79 IVSpecial Procedures .. AltimeterSelf-Test .. 4-1 Electronic Altimeter Self-Test .. 4-2 Radar Warning Receiver Self-Test .. 4-3 Tail Rotor Tracking .. 4-5 Main Rotor Tracking .. 4-9 Health Indicator Test(HIT) .. 4-13 Engine Topping .. 4-15 Fuel Control Flight Check .. 4-21 VCharts and Forms .. 5-1iiTM 55-1520-242-MTFSECTION I. - INTRODUCTION1. PURPOSE. The purpose of this manual is toprovide complete instructions for performing amaintenance test flight of UH-1, C/M, H/V andEH-1H/X aircraft. For the specific conditionswhich require a general or limited maintenance testflight refer to TM 55- 1500 -328-25 and the applicableaviationunitand Maintenance Test Flight.

10 A functional testflight for which the primary purpose is to deter-mine whether the airframe, power plant, accessoriesand other equipment are functioning in accordancewith predetermined requirements while subjected tothe intended Warnings, Cautions and Notes. Warnings, Cau-tions and Notes are used to emphasize important andcritical instructions and are used for the followingconditions:An operation procedure, practice, etc.,which, if not correctly followed, will resultin personnel injury or loss of operating procedure, practice, etc.,which, if not strictly observed, will resultin damage to or destruction of 55-1520-242-MTFNOTEAn operating procedure, condition, ect.