| Acronym | Meaning |
 | R | LEO Request Liaison Engineering Order |
| PCA | Pneumatic Control Assembly |
| NWW | Nose Wheel Well |
| NEA | Noise Equivalent Angle |
| SCAPE | Self-contained Atmosphere Protective Ensemble |
| EPS | ExPerimental Power Supply |
| CR | Certification Requirement |
| RS | Right Side |
| LRU | Line-replaceable Unit |
| PID | Program Introduction Document |
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