Rov. 1977 AC 43.13-2A office. The addresses of T.C. holders and FAA controlling regions are given in the FAA publication Type Certificate Data Sheets and Specifipacity. cations."
cial operations.
board configuration.
tested TO the criucal ultimate load factor. Refer to chapter 1 of this handbook for computation and testing procedures.
Chap 12 95
AC 43.13-2A When the cargo compartment is separated from the cockpit by a bulkhead that is capable of withstanding the inertia forces of emergency conditions a forward load factor of 4.5g. may be All other applications require the use of a 9g. forward load factor.
Each cargo tiedown fitting installation must be static tested under forward, side, and up load conditions. Individual fittings may be tested by applying a single pull of 12.6g. forward load at an angle of 18.5° up and 9.5° to the left or right, as applicable, of the aircraft longitudinal axis.
For example, assuming a 5,000 pound static pull (rating of a typical tiedown fitting) is applied as described and divided by the g. load factor we find the fitting installation will be capable of restraining a 397 pound load under emergency conditions.
9.5g. x 1.33 Apply 5,000 lb. pull 18.5° 9.5g. x 1.33 = 12.6g. 5,000 lb. - =397 1b.
9g. 12.6g.
1.5g.
9.18- 9.30 9g When a cargo-restraining net or cargo container with multiple attachments is used the static load requirements for each tiedown fitting may be divided equally between the fittings. For example, assume that the maximum cargo load to be carried is 1,800 pounds and 10 tiedown fittings are to be used, the static load requirement for each fitting is approximately 2,155 Ibs.
9g. x 1.33 x 1,800 10s.
=2154.6 Ibs.
10 fittings Placard individual tiedowns for the maximum weight to be secured.
247. OPERATING LIMITATIONS, LOADING IN- STRUCTIONS, AND PLACARDS. Prepare revisions or supplements to the aircraft's Flight Manual 96 Rev. 1977 or operating limitations, weight and balance records, and equipment list changes as necessitated by the installation of the litter, berth, or cargo tiedown systems.
NoTE.-Revisions or supplements to the approved portions of the aircraft's Flight Manual markings, placards, or other operating limitations require FAA engineering approval. Submit the requested changes and supporting data to the local FAA Flight Standards Office for review and processing.
Provide instructions covering the installation and use of the litter or cargo restraint systems.
For aircraft which require a Flight Manual, incorporate these instructions as a supplement.
On other aircraft, provide a placard which references the appropriate instruction. In the instructions, cover such items as removal and reinstallation of seats or other equipment exchanged for litters or cargo restraint systems, use of cargo nets, barrier nets, number and positioning of tiedown straps, maximum load for each compartment or tiedown area, permissible load per square foot, number of tiedown points allowable per foot of track, and maximum height of the load's center of gravity above the floor.
a. Cargo Area Placards. Install placards or other permanent markings to indicate the maximum allowable cargo load and weight per square foot limitation for each cargo area. Placard seat tracks as to number of tiedown points permissible per foot of track. Attach a permanent lable or other marking on each cargo net, barrier net, and at cargo tiedowns to indicate the maximum cargo weight that the net or attachment will restrain when installed according to the loading instructions.
b. Litter and Berth Placards. Install a placard or other permanent marking on each litter or berth indicating its permissible direction of installation (forward, aft, or side-facing), passenger weight limitation (if less than 170 lbs.), and whether or not the litter or berth may be occupied during takeoffs and landings.
248.-260. [RESERVED] Chap 12
Rev. 1977 AC 43.13-2A Chapter. 13. PENETRATION THROUGH PRESSURIZED STRUCTURE Section 1. ELECTRICAL WIRE BUNDLES AND COAXIAL CABLE FEED THROUGH PRESSURIZED STRUCTURE
261. GENERAL. This section describes typical methods for sealing openings where wires and coaxial cable are installed through pressurized structure.
a. Assure that the strength of the structure is maintained when installations require additional
b. The aircraft manufacturer's data may specify the size and location where additional openings are permitted and the reinforcement required to maintain the design strength of the affected
c. The manufacturer's data may also recommend the specific sealant to be used and provide instructions for the application.
Caution: Sealant and solvents may contain toxic and/or flammable components. Avoid inhalation of vapors and supply adequate ventilation. Wear appropriate respiratory protection while using these materials in con fined areas. Avoid contact with the skin and
262. CLEANING. Use a cleaning solvent and clean a larger area than required for the fair-lead or connector. Remove solvent by blasting with dry air and wiping with a clean soft cloth.
263. APPLICATION OF SEALANT. Seal electrical wire bundles and connectors where they pass through the opening in the pressurized structure.
a. Separate and coat each wire with sealant over the length which is to pass through the fairlead, fig. 13.1A. After coating each wire with sealant, pull the wire bundle into position in the fair-lead, fig. 13.1B. Assure that the fair-lead is located on the pressure side of the structure.
b. Apply sealant to the surface of the fair-lead which comes in contact with the pressurized structure. Use a spatula or brush and spread sealant on the entire surface approximately ⅓2-inch in thickness. Attach the fair-lead to the pressurized structure, sealant, sealant should extrude around the mounting flange (see fig. 13.1C).
c. Wrap the fair-lead with at least three turns of masking tape as shown in fig. 13.1D.
Puncture the masking tape over the injection hole in the fair-lead assembly and inject sealant with a sealing gun. Apply sealant over each fairlead fastener as shown in fig. 13.1E.
d. Complete all of the aforementioned steps during the application time of the sealant. Allow sealant to cure, remove masking tape and excess sealant which extruded from the fair-lead mounting flange.
e. Figures 13.2 and 13.3 illustrate a different type fair-lead and wire bundle connector. The procedure for sealant application is the same as previously described.
f. Figure 13.4 illustrates various coaxial connectors frequently used for installation through structure. Fair-leads are not recommended for installation of coaxial cable. Sealant application is the same as previously described.
264.-290. [RESERVED] Chap 13 97
Rev. 1977 AC 43.13-2A
- EXTRUDING
SEALANT
WIRE BUNDLE,
SEALANT
WIRE BUNDLE
SEALANT
EXTRUDING
SEALANT FIGURE 13.2 Fair-lead feed through.
— EXTRUDING
SEALANT FIGURE 13.3 Typical connector.
Chap 13 99
Rev. 1977 AC 43.13-2A Appendix 1 CROSS REFERENCE TABLE OF PARAGRAPH NUMBER CHANGES FROM AC 43.13-2 DATED 1965 Former Paragraph Revised Paragraph Former Paragraph Revised Paragraph 1 1 57 68 2 2 58 69 70 [Reserved] 74 75 76-78 [Reserved] 79 80 13-20 [Reserved] [Reserved] 66 81 67-70 [Reserved] 82-85 [Reserved] 71 76 [Reserved] 77-80 [Reserved] 92-95 [Reserved] 29-35 [Reserved] 105 106 [Reserved] [Reserved] 107-110 [Reserved] 111 112 94 113 95 114 96-100 [Reserved] 115-120 [Reserved] 47-50 [Reserved] 57-60 [Reserved] 101 121 102 122 61 103 123 124-125 [Reserved] 101 126 105 127 [Reserved] 106 128 107 129 108 130
Rev. 1977 AC 43.13-2A Former Paragraph Revised Paragraph Former Paragraph Revised Paragraph 109 131 156 187 110 132 • 157 188 111 133 158 189 112-120 [Reserved] 134-145 [Reserved] 190-195 [Reserved] 121 146 159 196 122 147 160 197 123 148 161 198 124 149 162 199 125 150 163 200 126 151 164 201 152-155 [Reserved] 165 202 127 128 156 157 166-180 [Reserved] 203 204 129 158 205 159-160 [Reserved] 206 130 161 207-210 [Reserved] 181 162 181 211 132 163 182 212 133 134 135 164 165 166 183 184 185-199 [Reserved] 213 214 215-240 [Reserved] 136 167 200 [Reserved] 168-170 [Reserved] 201 241 137 171 202 242 138 172 203 243 139 173 204 244 174-175 [Reserved] 205 245 140-150 [Reserved] 206 246 152 151 176 177 207 208-230 [Reserved] 247 248-260 [Reserved] 158 178 231 261 154 179 232 262 180-185 [Reserved] 233 263 155 186 234-260 264-290 [Reserved] U. S. GOVERNMENT PRINGING OFFICE: 1977 0 - 251-357