{
  "schema": "exhaust-hanger-validation-v1",
  "baseline_commit": "bd3bcc7f",
  "scope": "Factory Parts-1977 p127 distinguishes GEX7073 intermediate clip, GEX7250 insulating washers, WC108051 plain washers, fixing roles and GEX7155 mounting bracket; p128 distinguishes LH/RH supports and right-hand change-point branches. These are catalog roles, not fitted part identification. All strap/ear/link/formed-bracket profiles, dimensions, gauges, bores, bolt lengths, washer sections, body receivers and installed positions are estimates. Paired rubber washers are unloaded annuli without compression, stiffness or bonded ownership. The front body-flange upper face follows the existing estimated floor underside; rear receiver planes retain prior unregistered datums. Existing pipes, coupling, chambers and engine/body frames stay. Gearbox crossmember/cradle source crossings remain unresolved and are not erased by this hanger reconstruction. No loaded/hot clearance, support strength, sealing, real fastener engagement or verified exhaust replacement/removal path. The intermediate flange only meets the current floor outside its spring-hanger pocket; the inboard projected receiver is absent from that floor reference. Rear body receivers and all fixing maps remain unregistered. The RH annular pair is a generic insulation-role comparison, not a selection of either the early GEX7151/GEX7166 bush/spacer or later GEX7468/GEX7251 clip/rubber branch. The intermediate bracket also contacts existing spring-hanger source geometry; see the validation report for unresolved registration.",
  "source_groups": 12,
  "changed_constructor_step_volume_and_solid_count_checks": true,
  "valid_positive_step_solids": 44,
  "unchanged_pipe_and_chamber_meshes": [
    "underfloor_cross_car_main_pipe_reference",
    "underfloor_longitudinal_resonator_shell_comparison",
    "underfloor_resonator_to_cross_box_pipe_reference",
    "underfloor_transverse_silencer_shell_comparison",
    "underfloor_right_tail_pipe_reference"
  ],
  "hanger_checks": {
    "intermediate": {
      "static_source_contacts_mm3": {
        "clip_group_pipe": 0.0,
        "clip_group_insulators": 0.0,
        "clip_group_body_brackets": 0.0,
        "insulators_body_brackets": 0.0
      },
      "pipe_passage_open": true,
      "fixing_axis_material_witnesses": true,
      "paired_annular_insulators": true
    },
    "left_rear": {
      "static_source_contacts_mm3": {
        "clip_group_pipe": 0.0,
        "clip_group_insulators": 0.0,
        "clip_group_body_brackets": 0.0,
        "insulators_body_brackets": 0.0
      },
      "pipe_passage_open": true,
      "fixing_axis_material_witnesses": true,
      "paired_annular_insulators": true
    },
    "right_rear": {
      "static_source_contacts_mm3": {
        "clip_group_pipe": 0.0,
        "clip_group_insulators": 0.0,
        "clip_group_body_brackets": 0.0,
        "insulators_body_brackets": 0.0
      },
      "pipe_passage_open": true,
      "fixing_axis_material_witnesses": true,
      "paired_annular_insulators": true
    }
  },
  "front_body_flange_outboard_floor_edge_witness": true,
  "front_inboard_receiver_absent_from_floor_reference": true,
  "body_bracket_cabin_source_contacts_mm3": {
    "cabin_left_floor_with_retained_seat_bores_reference": 0.0,
    "cabin_right_floor_with_retained_seat_bores_reference": 0.0,
    "cabin_rear_floor_formed_crossmember_reference": 0.0
  },
  "body_bracket_spring_hanger_source_contacts_mm3": {
    "rear_left_front_spring_body_box_and_lower_flange_reference": 910.64999999997,
    "rear_left_front_spring_lower_plate_and_bored_ears_comparison": 538.0173445568252,
    "rear_left_four_front_spring_body_fixing_envelopes": 0.0,
    "rear_left_front_eye_pin_distance_and_special_washer_references": 474.3255891126892,
    "rear_right_front_spring_body_box_and_lower_flange_reference": 0.0,
    "rear_right_front_spring_lower_plate_and_bored_ears_comparison": 0.0,
    "rear_right_four_front_spring_body_fixing_envelopes": 0.0,
    "rear_right_front_eye_pin_distance_and_special_washer_references": 0.0
  },
  "retained_main_pipe_support_frame_crossings_mm3": {
    "rear_power_hollow_crossmember_and_open_floor_returns": 5613.561638229268,
    "rear_power_connected_folded_cradle_inclined_faces_and_tunnel_ears": 4482.58651022409
  },
  "unchanged_surrounding_native_files": 10,
  "sha256": {
    "underfloor-exhaust-reference.json": "1bc9730e34ccfa2ef0556147bb4cabdbec0e7ed22a4f1bbc22fea17f797eb39f",
    "underfloor-exhaust-reference.step": "7a676134cff6115c69689f16e19228b58df9bac2a07184449af48510ffbac017"
  }
}