TM 1-8415-215-12&P TECHNICAL MANUAL OPERATOR'S AND AVIATION UNIT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST FOR HELMET, FLYER'S: SPH-4B (NSN 8415-01-308-5359) (REGULAR) (NSN 8415-01-308-5360) (EXTRA LARGE) DISTRIBUTION STATEMENT A: Approved for public release; distribution Is unlimited. H E A D Q U A R T E R S , D E P A R T M E N T O F T H E A R MY 1 5 J A N U A R Y 1 9 93 TM 1-8415-215-12&P C 2 CHANGE HEADQUARTERS DEPARTMENT OF THE ARMY NO. 2 WASHINGTON, D.C., 30 JUNE 1994 OPERATOR'S AND AVIATION UNIT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST FOR HELMET, FLYER'S: SPH-4B (NSN 8415-01-308-5359) (REGULAR) (NSN 8415-01-308-5360) (EXTRA LARGE) DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. TM 1-8415-215-12&P, 15 January 1993, is changed as follows: 1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar in the margin. An illustration change is indicated by a miniature pointing hand. Remove pages Insert pages a and b a and b ---- 3-2.1 through 3-2.3/ (3-2.4 blank) 2. Retain this sheet in front of manual for reference purposes. By Order of the Secretary of the Army: GORDON R. SULLIVAN General, United States Army Official: Chief of Staff MILON H. HAMILTON Administrative Assistant to the Secretary of the Army 08991 DISTRIBUTION: To be distributed in accordance with DA Form 12-31-E, block no. 3317, requirements for TM 1-8415-215-12&P. TM 1-8415-215-12&P C 1 CHANGE HEADQUARTERS DEPARTMENT OF THE ARMY NO. 1 WASHINGTON, D.C., 30 December 1993 OPERATOR'S AND AVIATION UNIT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST FOR HELMET, FLYER'S: SPH-4B (NSN 8415-01-308-5359) (REGULAR) (NSN 8415-01-308-5360) (EXTRA LARGE) DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. TM 1-8415-215-12&P, 15 January 1993, is changed as follows: 1. Remove and insert pages as indicated below. New or changed text material is indicated by a vertical bar in the margin. An illustration change is indicated by a miniature pointing hand. Remove pages Insert pages ------------ 2-8.1/(2-8.2 blank) A-1/(A-2 blank) A-1/(A-2 blank) 2. Retain this sheet in front of manual for reference purposes. By Order of the Secretary of the Army: GORDON R. SULLIVAN General, United States Army Official: Chief of Staff MILTON H. HAMILTON Administrative Assistant to the Secretary of the Army 05986 DISTRIBUTION: To be distributed in accordance with DA Form 12-31-E, block no. 3317, requirements for TM 1-8415-215-12&P. TM 1-8415-215-12&P WARNINGS When donning the helmet, ensure that nape strap is pulled down so that keeper tab is taut. Failure to do so will decrease helmet stability and may cause injury to the wearer. The helmet must be worn with the chinstrap properly attached and adjusted. Failure to secure the chinstrap will decrease helmet stability and may cause injury to the wearer. Chinstrap must be secured under crewmember's chin at all times. DO NOT allow oxygen mask to be placed between chinstrap and chin. Failure to heed this warning will result in a loss of stability and may cause injury to the crewmember. WARNINGS Prior to entering potentially hazardous situations, the chin and nape straps should be secured very tightly. Failure of personnel to comply with this procedure can result in their injury. WARNINGS Rubber base adhesive and silicone rubber base adhesive are extremely flammable. Do not use when smoking or in the vicinity of an open flame. WARNINGS Paint could be flammable, toxic in sufficient concentrations, and it could cause dermatitis with skin contact. Care should be taken to avoid breathing of the vapors and skin contact. Avoid use while smoking or in the vicinity of open flames. WARNINGS Headaches can result if the cross straps are too tight. If they are too loose, hearing protection can be affected. WARNINGS Due to the serious limitations imposed by the Laser Protective Visors (LPVs) on visual acuity outside of the aircraft as well as on flight displays within the cockpit, the LPVs will only be used when actual laser hazards exist. For day or night VFR flights at altitudes below low level flight, the pilot and co-pilot will analyze the current situation and both will decide if flight should be continued with the LPVs in use. Some considerations are the local laser hazards, ambient light levels, and terrain. Approval for use must be annotated on the flights crews mission brief. Change 2 a TM 1-8415-215-12&P WARNINGS Two LPVs cannot be worn in the down position at the same time. WARNINGS The dark LPVs (AMBER) are not compatible with aircraft or ground support night lighting and are not safe for twilight or night flight. Do not use the dark LPVs during twilight or at night. WARNINGS The dark LPVs (AMBER) will change the appearance of and possibly eliminate some red and/or green light sources. Testing indicates that some red lights take on an orange hue, that some cockpit warning lights are difficult to read though still visible, and that some cockpit gauges are illegible. Do not use the dark LPVs for IFR flight. WARNINGS The light LPVs (GREEN) will change the appearance of any possibly eliminate some red light sources. Testing indicates that some red lights take on an orange hue, that some cockpit warning lights are difficult to read though still visible, that the distance one can see some exterior red lights is reduced, and that red cockpit map lights are virtually unusable. Use extra caution at night. WARNINGS The LPVs are laser wavelength specific and will protect against only those lasers of the designated wavelength. The light LPV (GREEN) will protect against ruby and neodymium lasers only. The dark LPV (AMBER) will protect against ruby, neodymium, and one other (classified wavelength) lasers only. WARNINGS If lased, do not stare at the laser source. Some lasers have secondary harmonic wavelengths that may cause some eye damage - these secondary wavelengths may not be filtered by these LPVs. b TM 1-8415-215-12&P WARNINGS The LPVs are not intended to provide protection against broad spectrum bright light. Do not use the LPVs to view solar eclipses, electric welding or other potentially eye damaging light sources. WARNINGS The LPVs are not to be used as a substitute for other types of laser eye protection. Protection during maintenance or servicing of specific laser systems should be as specified by the appropriate technical manual. WARNINGS The LPVs reduce ambient light levels available to the eye. Eye Accommodation should be allowed prior to operation during periods of dusk or dawn. CAUTION Excessive scratching may degrade the laser protection factor of the LPVs. Clean according to instructions. Turn in LPVs with an excessive number of scratches or any deep scratches. CAUTION Exposure to direct sunlight may degrade the laser protection factor of the LPVs. Unnecessary sunlight exposure should be avoided. CAUTIONS When donning or doffing the helmet, spread the helmet only enough to clear head. Excessive spreading can damage the helmet. When unsoldering the leads for the AH-1S sight, be careful not to break the glass on the magnetic switch. c TM 1-8415-215-12&P NOTES For aircrews operating flying gunships, the AH-1S boresight must be adjusted by the gunner after the initial fitting and every 120 days thereafter (during preventive maintenance). If an M-43 mask is to be used with the helmet. Rub a small amount of talcum powder over the surface of the hood to make donning the helmet with the thermoplastic liner easier. The cloth cover of the thermoplastic liner can be removed and laundered or dry- cleaned. After each cleaning, replacement of the two-sided tape is recommended. If a wedge shaped washer exists on the bottom of an AH-1 S sight to be installed, this washer must be removed and attached with the flat spacer provided. d TM 1-8415-215-12&P TECHNICAL MANUAL HEADQUARTERS DEPARTMENT OF THE ARMY NO. 1-8415-215-12&P WASHINGTON, D.C., 15 JANUARY 1993 OPERATOR'S AND AVIATION UNIT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST FOR HELMET, FLYER'S: SPH-4B (NSN 8415-01-308-5359) (REGULAR) (NSN 8415-01-308-5360) (EXTRA LARGE) REPORTING ERRORS AND RECOMMENDING IMPROVEMENTS You can help improve this manual. If you find any mistakes or if you know of any way to improve the procedures, please let us know. Mail your letter, DA Form 2028 (Recommended Changes to Publications and Blank Forms), or DA Form 2028-2 located in the back of this manual direct to: Commander, US Army Aviation and Troop Command, ATTN: AMSAT-1-MP, 4300 Goodfellow Blvd., St. Louis, MO 63120-1798. A reply will be furnished directly to you. DISTRIBUTION STATFMFNT A: Approved for public release; distribution is unlimited. TABLE OF CONTENTS Page CHAPTER 1 INTRODUCTION AND GENERAL INFORMATION....................................... 1-1 Section I Equipment Description and Data ................................................................... 1-1 CHAPTER 2 OPERATING INSTRUCTIONS...................................................................... 2-1 Section I Description and Use of Operator's Controls and Indicators ............................ 2-1 Section II Operation Under Usual Conditions................................................................. 2-4 Section III Operator's Preventive Maintenance Checks and Services............................. 2-9 Section IV Troubleshooting ............................................................................................ 2-13 CHAPTER 3 MAINTENANCE INSTRUCTIONS................................................................. 3-1 Section I Helmet Sizing and Fitting............................................................................... 3-1 Section II Preventive Maintenance Checks and Services.............................................. 3-3 Section III Troubleshooting ............................................................................................ 3-5 Section IV Cleaning........................................................................................................ 3-10 Section V Aviation Unit Maintenance Procedures.......................................................... 3-11 i TM 1-8415-215-12&P TABLE OF CONTENTS (Continued) Page APPENDIX A REFERENCES ................................................................................................ A-1 APPENDIX B MAINTENANCE ALLOCATION CHART........................................................... B-1 APPENDIX C REPAIR PARTS AND SPECIAL TOOLS LIST.................................................. C-1 APPENDIX D EXPENDABLE SUPPLIES AND MATERIALS LIST.......................................... D-1 ii TM 1-8415-215-12&P CHAPTER 1 INTRODUCTION AND GENERAL INFORMATION Section I. EQUIPMENT DESCRIPTION AND DATA 1-1. Equipment Characteristics, Capabilities, and Features. a. Purpose. This manual contains the instructions required by the Operator and Aviation Unit Maintenance personnel to use and maintain the SPH-4B Regular and Extra Large, Flyer's Protective Helmet. The SPH-4B (Figure 1 -1) provides flight personnel with head, ear, and eye protection and a means for radio communication. b. Capabilities and Features. • Lightweight design for demanding day and night missions. • Impact-resistant helmet shell. • Polystyrene energy-absorbing liner reduces impact forces. • Inner thermoplastic liner provides a close fit and optimizes comfort. • Adjustable retention assembly provides stability and optimizes fit in the chin and nape. • Rotatable earcups reduce noise and flex to absorb lateral impact. • Integrated communications system. • Visor assembly provides retractable clear and neutral lenses and supports Aviator's Night Vision Imaging System (ANVIS) Night Vision Goggles (NVGs). 1-1