1、DEPARTMENT OF DEFENSESTANDARD PRACTICEMODIFICATION AND MARKING REQUIREMENTSFOR TEST EQUIPMENTIN AEROSPACE VEHICLESAND RELATED SUPPORT EQUIPMENTAMSC F7307 FSC 15GPDISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.NOT MEASUREMENT SENSITIVEMIL-STD-2773318 May 1998Provided
2、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-27733iiFOREWORD1. This standard is approved for use by all Departments and Agencies of theDepartment of Defense (DoD).2. This standard identifies marking, safety, and configuration control practices for
3、temporary non-standard modifications on Department of Defense owned aerospacevehicles, and related support equipment in support of research, development, test andevaluation.3. The standard marking requirements provide the operational and maintenancecommunity the ability to easily identify test and a
4、ssociated equipment installed inaerospace vehicles. These standard marking requirements also provide a commoninterface between all departments and agencies operating and maintaining aerospacevehicles modified with test equipment. The marking requirements are not defined inany other handbooks, non-go
5、vernment standards, or military specifications.4. This document addresses unique safety concerns that are encountered withtemporary non-standard modifications. Airworthiness certificates, operational groundchecks, aerodynamic evaluation flights, and examination of products are specified inthis stand
6、ard to help ensure the safety of aircrew and ground-crew members associatedwith aerospace vehicles that have temporary non-standard modifications accomplished.5. Beneficial comments (recommendations, additions, deletions) and anypertinent data which may be of use in improving this document should be
7、 addressed to412 TW/TSIDM, 25 N Wolfe Ave, Edwards AFB, CA 93524, or to the Preparing Activity;using the Standardization Document Improvement Proposal (DD Form 1426) appearingat the end of this document.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,
8、-MIL-STD-27733iiiCONTENTSPARAGRAPH PAGE1. SCOPE. 11.1 Scope. 12. APPLICABLE DOCUMENTS. 13. DEFINITIONS. 13.1 Modification engineering authority. 13.2 Modification number. 13.3 Temporary non-standard modification. 14. GENERAL REQUIREMENTS. 14.1 General. 14.2 Modification data. 14.2.1 Temporary non-st
9、andard modification documentation. 24.2.2 Component certificate of airworthiness. 24.2.3 Aerospace vehicle certificate of airworthiness. 24.2.4 Modification number. 24.3 Checks and evaluations. 24.3.1 Operational ground checks 24.3.2 Aerodynamic evaluation flight 24.3.3 Inspection prior to first fli
10、ght. 24.3.4 Mass properties 34.3.5 Electrical loads. 35. DETAILED REQUIREMENTS. 35.1 General. 35.2 Modification requirements. 35.2.1 Master power switch. 35.2.2 Polyvinyl chloride (PVC) wiring. 35.2.3 Advisory plate. 35.3 Identification and marking. 45.3.1 General markings. 45.3.2 Control components
11、. 45.3.3 Modification components. 45.3.4 Specially calibrated instruments or modified components 45.3.5 External components. 45.3.5.1 Fuel tanks. 45.3.5.2 Non-standard tanks and stores. 45.3.6 Electrical wire marking. 55.3.6.1 Electrical wire identification 55.3.6.2 Specialty wiring. 55.3.7 Tubing 5
12、Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-27733ivPARAGRAPH PAGE6. NOTES. 56.1 Intended use. 56.2 Associated data item description (DID). 66.3 Reference information. 66.3.1 Wire marking and installation. 66.3.2 General engineering manual
13、s. 66.3.3 Other manuals. 66.3.3.1 Copies of manuals. 66.3.4 Quality assurance. 66.3.4.1 Responsibility for inspection. 66.4 Subject term (key word) listing. 76.5 Changes from previous issue. 7FIGURE1. Example of typical specific control identification plate. 82. Example of typical general control id
14、entification plate. 83. Component identification label 94. Component identification, limited space. 9INDEX. 10Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2773311. SCOPE1.1 Scope. This standard identifies marking, safety, and configuration
15、 controlpractices for temporary non-standard modifications on Department of Defense ownedaerospace vehicles, and related support equipment in support of research,development, test and evaluation.2. APPLICABLE DOCUMENTS. Not applicable.3. DEFINITIONS3.1 Modification engineering authority. Modificatio
16、n engineering authority is thegovernment engineering activity responsible for the safe integration of the temporarynon-standard modification into the aerospace vehicle and related ground supportequipment.3.2 Modification number. A modification number is a unique number issued bythe configuration man
17、agement office responsible for the temporary non-standardmodification project. The modification number is to be used to track the modificationand will appear on the modification paperwork generated.3.3 Temporary non-standard modification. Temporary non-standardmodifications are temporary hardware or
18、 software changes or alterations to aerospacevehicles (aircraft, guided weapons, drones, remotely piloted vehicles (RPV), andmissiles other than strategic), airborne support equipment, external and internal stores,subsystems, components, or support equipment that interface with an aerospacevehicle.
19、They are installations or changes that support research development, designchanges to existing modifications, and development and operational test and evaluationprograms or in-service testing of systems or equipment.4. GENERAL REQUIREMENTS4.1 General. This section covers the general aspects of Aeros
20、pace Vehiclemodification requirements.4.2 Modification data. The following general data requirements shall apply for alltemporary non-standard modifications.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2773324.2.1 Temporary non-standard mo
21、dification documentation. Temporary non-standard modification documentation shall be prepared and submitted to thecontracting activity in accordance with the Contract Data Requirements List (DD Form1423) (see 6.2) for contractor generated modifications.4.2.2 Component certificate of airworthiness. A
22、 component certificate ofairworthiness shall be provided for all installed equipment that is part of the temporarymodification. The certificate shall indicate that the equipment is airworthy and safe tooperate in the intended environment at design conditions. The certificate shall alsoidentify any a
23、ssociated hazards and limitations.4.2.3 Aerospace vehicle certificate of airworthiness. An aerospace vehiclecertificate of airworthiness shall be provided prior to flight of a modified aerospacevehicle. The certificate shall identify any flight restrictions imposed as a result of themodification(s).
24、4.2.4 Modification number. Modification numbers for each modification ordemodification accomplished shall be recorded by a modification number for the lifetimeof, and transferred with, the aerospace vehicles permanent flight records.4.3 Checks and evaluations. Checks and evaluations shall be accompl
25、ished forall manned aerospace vehicles.4.3.1 Operational ground checks. Operational ground checks shall beaccomplished to assure an aerospace vehicle is safe for flight. All systems andcomponents affected by a temporary modification, including systems affected bysoftware changes, shall be operationa
26、lly ground checked to determine safe operationand condition prior to release for flight. These checks shall include electromagneticcompatibility, electromagnetic interference, and related system functional checks. If anadequate ground check cannot be accomplished, a power-on check shall beaccomplish
27、ed prior to the first test flight.4.3.2 Aerodynamic evaluation flight. Aerodynamic evaluation flight(s) are requiredwhenever the modification changes aerodynamic configuration of the aerospacevehicle, changes flight controls, or affects structural strength. An aerodynamicevaluation flight shall be p
28、erformed by experimental flight test pilots to evaluateaerospace vehicle structure or aerodynamic characteristics and to determine the effectsof the modification on the aerospace vehicle.4.3.3 Inspection prior to first flight. Each modification shall be thoroughlyexamined to determine compliance wit
29、h the requirements herein. A physicalconfiguration inspection and inventory of equipment shall be accomplished to determinethe accuracy of identification and documentation and the adequacy of maintenance andoperation instructions.Provided by IHSNot for ResaleNo reproduction or networking permitted w
30、ithout license from IHS-,-,-MIL-STD-2773334.3.4 Mass properties. Mass properties for the modified aerospace vehicle,inclusive of any previous modifications, shall be evaluated and documented to indicatethe actual weight, moment, and center of gravity change resulting from the currentadditional modif
31、ication. Records will be maintained indicating the weight and location ofall installed and removed equipment. The modification engineering authority willprovide and certify the mass properties data for previously installed modifications. Thenew center of gravity must fall within maximum allowable ce
32、nter of gravity limits for thebaseline aerospace vehicle.4.3.5 Electrical loads. Electrical load requirements of any new installed oractivated equipment shall be identified and evaluated against available aerospacevehicle power as impacted by the electrical loads of previous modifications. Recordsin
33、cluding power source connectivity and power consumed or restored will bemaintained for all modification-related equipment. The modification engineeringauthority will provide and certify the electrical loads data for previously installedmodifications.5. DETAILED REQUIREMENTS5.1 General. The detailed
34、requirements for installation, identification, and markingof mechanical and electrical components installed for temporary non-standardmodifications, are given in this section.5.2 Modification requirements. The following items shall be installed on everytemporary non-standard modification.5.2.1 Maste
35、r power switch. A master power switch readily accessible to theaircrew shall be installed to de-energize, at one time, all test equipment andinstrumentation installed in conjunction with a temporary non-standard modification,except for that required for safe operation of the aerospace vehicle or rel
36、ated supportequipment. The switch shall be installed on a black plate with an orange border. Theplate shall be identified with solid contrasting lettering as follows: “TEMPORARYMODIFICATION EQUIPMENT MASTER POWER SWITCH.”5.2.2 Polyvinyl chloride (PVC) wiring. PVC wiring, electrical cable, or wire wi
37、thPVC insulation shall not be used in manned aerospace application for interconnectionof components.5.2.3 Advisory plate. An advisory plate shall be installed in a conspicuouslocation in the cockpit of manned aerospace vehicles. This plate shall be black with anorange border. The plate shall be mark
38、ed with solid contrasting lettering as follows:“TEMPORARY MODIFICATION EQUIPMENT INSTALLED SEE OPERATING ORMAINTENANCE INSTRUCTIONS.”Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2773345.3 Identification and marking. All items installed as
39、part of a temporary non-standard modification shall be marked as indicated in this section. Marking will beapplied so that it does not interfere with equipment functionality.5.3.1 General markings. Modified equipment and components shall be markedwith orange marking to facilitate ready identificatio
40、n. Whenever possible, anidentification label shall be positioned so that it is readily visible when the item isinstalled. When it is not feasible to mark installed equipment in orange directly (i.e.engine parts), an identification label shall be placed as close to the equipment aspossible.5.3.2 Cont
41、rol components. All control components of installed equipmentincluding but not limited to switches, release handles and actuating devices, shall beclearly marked as to their function (see figures 1 and 2).5.3.3 Modification components. All modification components such as cameras,inverters, junction
42、boxes, amplifiers, control boxes, recorders and test equipment, shallbe identified by a modification label (see figures 3 and 4).5.3.4 Specially calibrated instruments or modified components. Speciallycalibrated instruments or modified components such as altimeters, temperaturemeasuring devices, or
43、pressure gauges installed as part of the crew station or in photoor observers panels, shall be identified in orange (i.e., an orange dot for analoggauges). The markings shall be located so they do not interfere with the operation orreadability of the instrument.5.3.5 External components. External co
44、mponents such as pylons, fuel tanks, pitottubes, antennas, or instrumentation pods, shall be marked with the modification numberin readily visible lettering and orange markings (see 5.3.1).5.3.5.1 Fuel tanks. When fuel tanks are used as carriers for test equipment, theyshall be identified by an enci
45、rcling four-inch band of orange located approximately one-quarter of the tank length from the leading edge. The inscription “TEMPORARYMODIFICATION EQUIPMENT INSTALLED DO NOT FUEL” shall be marked inorange adjacent to the filler cap(s). The modification number shall be stenciled inorange.5.3.5.2 Non-
46、standard tanks and stores. Non-standard tanks and stores used ascarriers for test equipment shall be marked with a four-inch orange band around thetank or store, located approximately one-quarter of the tank or store length, from theleading edge. Tanks and stores shall have the modification number stenciled withreadily visible lettering and numbers.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-2773355.3.6 Electrical wire marking. Electrical wire marking shall contai
