ENGINEERING CHANGE NOTICE ECN-2214 (Rev A -> Rev B)
Project: Ridge-7 Pump Housing    Date: 2026-08-20

DIMENSION CHANGES (drawing units: millimetres)
1) D1: 120.00 -> 125.50
2) D2: 45.00 -> 41.25
3) D3: 30.00 -> 1.250 in        <-- customer note is in INCHES
4) D4: 200.00 -> 200.00 (no change; verify stack-up only)
5) D5: 88.00 -> 90.00

STACK-UP REQUIREMENT (window tightened by this ECN)
GAP = D4 - (D1 + D2 + D3) must remain within 0.50 .. 2.00 mm.
Rev-B release is INVALID if the gap check fails.

PART CHANGES
- Item 2: REPLACE P-2043 with P-2043B (hardened spacer); qty 4 -> 6
  (two extra mounting points added by change 1).
- Item 3: REPLACE P-3108 with P-3108S (sealed bearing cap); qty unchanged.
- Item 4: qty 12 -> 16 (follows item 2 quantity).

DRAWING REQUIREMENTS
- Revision block must gain the REV B row referencing ECN-2214 with a
  one-line description and the 2026-08-20 date, keeping the REV A row.
- The sheet title block (BORDER) must be updated from REV A to REV B;
  a stale REV A title fails the release.
- Datum feature symbols must appear in ASME Y14.5 order A, B, C.
- All dimension texts updated on layer DIMS; callout bubbles on CALLOUT
  must equal the Rev-B BOM part list exactly (four parts, no extras).
